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Introduction to Fractions Workbook

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3rd Grade fraction word problems

Identifying and comparing fractions word problems.

These printable worksheets have grade 3 word problems related to identifying and/or comparing fractions. They also provide practice in simplifying fractions. Both fractions and mixed numbers are used.

solve fraction problems year 3

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Fraction Worksheets for Year 3 (age 7-8)

Children coming into Year 3 should have a sound understanding of simple fractions, especially halves, quarters and thirds.  They should have had plenty of practical experience dividing shapes and sets of objects into quarters and thirds.

There are plenty of new concepts on fractions to be understood in Year 3,but it is still important to use practical work, using shapes and objects, to help with understanding.  A key step is to begin working with tenths and recognising that tenths arise from dividing an object into ten equal parts. Later this can be developed to dividing one-digit numbers or quantities by 10. This is crucial for understanding our decimal system and understanding that a fraction such as three tenths can also be represented as a decimal (0.3) and connects to dividing 3 by 10. Counting in tenths can also help enormously with this. We have a great selection of worksheets which deal with writing tenths, counting in tenths and converting tenths to decimals.

Other fractions are also introduced, such as fifths, and equivalence between fractions is developed with the help of pictures and diagrams. This leads on to ordering fractions with the same denominator. One of the quirks of fractions, which some children find hard to understand, is that as the denominator gets larger the size of the number gets smaller (e.g. one tenth is smaller than one fifth; one twentieth is smaller than one tenth and so on). We have some excellent ordering fractions pages for Year 3 to help consolidate this concept. As well as these, some of our most popular worksheets are the sets of finding fractions of numbers, with questions such as ‘What is one sixth of 30?’ Again, the link between fractions and division needs to be constantly reinforced.

As the year progresses children will be introduced to adding and subtracting fractions, but only with the same denominator and with totals up to one whole one. Simplifying fractions is important at this stage and children should be encouraged to write fractions in their simplest form. (e.g. two sixths can be simplified to one third).

All this will lead onto much more on decimals and fractions in Year 4, including hundredths and further work on equivalence. If you child is finding the Year 3 work difficult then it is important to go back to Year 2, or even Year 1, and see what is understood and what concepts have not been fully understood.

Understand fractions and equivalent fractions

Understanding fractions and work on the importance of equivalent fractions.

Preview of worksheet Complete the fraction sequences

Colour the correct fractions to match the sequences.

Preview of worksheet Use fraction notation

Various fraction problems.

Preview of worksheet Equivalent fractions

Tricky work on equivalent fractions.

Preview of worksheet Order fractions

Order fractions with the same denominator.

Preview of worksheet Ordering fractions

Order simple fractions.

Preview of worksheet Writing fractions

A little bit of revision on reading and writing fractions.

Understanding halves, quarters and thirds

Revision of work on halves, quarters and thirds.

Preview of worksheet Halves, quarters and thirds (1)

Finding halves, quarters and thirds of numbers of bees etc..

Preview of worksheet Halves, quarters and thirds (2)

More finding halves, quarters and thirds.

Preview of worksheet Halves, quarters and thirds (3)

More finding halves, quarters and thirds - fun colouring.

Preview of worksheet Halves and quarters word problems

Some tricky word problems using halves and quarters.

Preview of worksheet More than less than or equal to a half

Ordering fractions as more than, equal to or less than a half.

Understanding tenths

Understanding tenths and counting in tenths.

Preview of worksheet Fractions: tenths

Chocolate cakes to help with understanding tenths.

Preview of worksheet Colouring tenths

Colouring tenths of various shapes.

Preview of worksheet Recognise tenths

Introducing tenths by colouring one tenth; then finding six tenths, seven tenths etc of shapes. Finding out that five tenths is the same as a half.

Preview of worksheet More tenths

Writing tenths in words and as a fraction.

Preview of worksheet Finding tenths: animals

Finding tenths of various animals.

Preview of worksheet Tenths of numbers of objects

Finding tenths of numbers of objects.

Preview of worksheet Tenths as decimals

Looking at tenths as decimals and fractions.

Preview of worksheet Tenths: fractions as decimals

Matching fractions and decimals. ordering fractions and decimals.

Preview of worksheet Count on in tenths

Counting on in tenths.

Preview of worksheet Estimate tenths

Estimating tenths on a number line.

Find fractions of amounts and numbers

Finding fractions of amounts.

Preview of worksheet Fractions of shapes (quarters, thirds, fifths)

Shading quarters, thirds or fifths of various shapes.

Preview of worksheet Find fractions of shapes

Finding fractions of shapes. Makes a change from numbers!

Preview of worksheet Non unit fractions

A non-unit fraction is any fraction which does not have one as a numerator.

Preview of worksheet Fractions: pizzas

Find fractions of pizzas.

Preview of worksheet Fractions: fifths and sixths pizzas

More pizzas, this time concentrating on fifths and sixths.

Preview of worksheet Fractions: Tommy's allotment

Finding fractions of an allotment: equivalent fractions.

Preview of worksheet Find fractions of numbers

Finding fractions of numbers. Working with halves, quarters, thirds and tenths. Remember, to find one fifth, divide by 5.

Preview of worksheet Find fractions of numbers (2)

More finding fractions of numbers.

Preview of worksheet Solving word problems with fractions

Solving word problems involving fractions.

Adding and subtracting fractions

Begin to add and subtract fractions with the same denominator.

Preview of worksheet Adding fractions: bar models

Use the bar models to help with adding fractions.

Preview of worksheet Add fractions

Adding fractions with visual clues.

Preview of worksheet Adding fractions (1)

Adding fractions with the same denominator.

Preview of worksheet Adding fractions (2)

More adding fractions with the same denominator.

Preview of worksheet Subtracting fractions (1)

Subtracting fractions with the same denominator.

Preview of worksheet Subtracting fractions (2)

More subtracting fractions with the same denominator.

Preview of worksheet Add and subtract fractions

A mixture of addition and subtraction of fractions with the same denominator.

Preview of worksheet 2014 programme of Study: Year 3 Fractions

The statutory requirements for fractions in Year 3.

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solve fraction problems year 3

What your child will learn

Understand and count in tenths.

In Year 3, your child will learn to count in tenths. They will understand that finding a tenth is the same as dividing by ten (by dividing objects, sets of objects, and numbers into ten equal parts).

This will help them to keep seeing the connection between fractions and division. It is possible that your child will start to be introduced to decimals at this stage, too.

Find fractions of a set of objects

Your child will learn to find and write fractions of a given number of objects. For example:

Find     of 15.   First, your child can find   of 15 by dividing the total by the denominator : 15 ÷ 5 = 3.   Then, they can multiply this result by the numerator to find the correct fraction: If   of 15 is 3, then    of 15 is 3  × 2 = 6.     of 15 is therefore 6.

Your child will be able to do this with unit and non-unit fractions. They will learn that:

1/4

Use fractions as numbers

1/2

Your child will be able to do this with unit and non-unit fractions:

2/3

Show equivalent fractions using diagrams

1/2

They’ll show their understanding of equivalent fractions by drawing diagrams like this:

Diagram showing a half and two quarters. They are equivalent.

Your child will also learn to use objects and  fraction walls  to show equivalent fractions.

Add and subtract fractions with the same denominator

2/9

Compare and order fractions

Solve problems that involve all of the above.

Finally, your child will learn to put all this learning into practice by solving problems involving fractions.

They will be able to relate fractions to division, count in fractional steps (for example, counting up and down in tenths), compare fractions, understand  unit  and  non-unit fractions , understand equivalent fractions, find fractions of amounts, and add and subtract fractions with the same denominator.

How to help at home

There are lots of everyday ways you can help your child to understand fractions. Here are just a few ideas.

1. Make fraction snowflakes

Paper folding can be a great way to explore fractions.

Decorate a piece of paper or card and then ask your child to fold the paper into different equal parts. For example, they could fold the paper into fifths by creating five equal sections. Ask them to show you a fifth, two-fifths, three-fifths, four-fifths, and five-fifths, which they can see is equivalent to a whole.

Challenge your child by giving the paper a value and asking them to work out what the fractions would be worth. What would one fifth represent if the whole paper had a value of 10? As they fold, they may like to cut patterns into the paper to make a ‘snowflake’ and watch the pattern develop as they fold further.

2. Have fun with food

Cake, pizza, or any foods with a regular shape can help children understand what fractions are and how they work. Ask your child questions like, ‘If I cut our cake into 8 pieces, what fraction will each piece be?’

Foods that people eat lots of can help your child understand how to find fractions of amounts. For example:

‘We have 12 fish fingers in the packet. There are 4 of us. What fraction of the fish fingers can we each have? How many fish fingers would that be?’

Activity: Cupcake fractions

Cupcake fractions

3. Compare fractions together

In Year 3, your child will compare  unit fractions  and fractions with the same  denominator  by saying which fraction is bigger or smaller – and explaining how they know.

1/3

4. Fraction countdown

1/10

‘Would you prefer it if I cut this cake into ten equal pieces and gave you a piece, or if I cut the cut into two equal pieces and gave you a piece?’

Print out the  Fraction Match activity sheet and cut out each fraction card. Take a selection of cards and see if your child can put them all in order, either from largest to smallest or smallest to largest. Are there any equivalent fractions? See if your child can match them up.

Activity: Fraction Match

solve fraction problems year 3

5. Make a fraction wall

Equivalent fractions are different fractions that have the same value. In Year 3, your child will learn about equivalent fractions with small denominators using drawings and diagrams.

1/2

Why not try making a fraction wall with your child? You could investigate using the computer to make your fraction wall by creating a table and splitting each row into the equal number of parts you need. For example, to represent fifths, you would have to split the whole row into five equal parts.

Alternatively, you can download our fraction wall below.

Fraction wall

solve fraction problems year 3

6. Adding and subtracting fractions

Try adding and subtracting fractions with the same denominator with your child. Try to do this within a whole, i.e. make sure that the sum uses numbers less than one, including the answer.

Using drawings or diagrams can help your child visualise adding and subtracting fractions. For example:

 +   =    This could be calculated using a diagram like this:     Y our child will first split the whole into five equal parts. Your child can then shade one box to represent   and two boxes to represent  . They will then be able to see that the total is  .
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Classroom Stars

Year 3 Solving Fraction Problems Worksheets | KS2 Fractions | Primary Maths

Year 3 | Solving Fraction Problems Worksheets

In these Year 3 solving fraction problems worksheets , your learners will embark on a journey of real-world word problems, utilising their knowledge of fractions to find the answers.

In these Year 3 solving fraction problems worksheets, children are encouraged to actively apply their understanding of fractions to solve a diverse set of word problems. By engaging with various fraction problems, learners deepen their understanding of fractions and their related operations.

Our Year 3 solving fraction problems worksheets are aligned with KS2 fractions on the primary national curriculum. All of our Year 3 fractions worksheets can be used with your ideas for primary maths activities, learning resources, teaching material, visual aids, games, differentiation, display boards, homework, and lesson plans.

You may also be interested in our Year 3 Counting in Tenths Worksheets .

Explore all of our Year 3 maths worksheets .

Access this resource and thousands more for just £9.95 per year

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Problem Solving with Fractions: Foundation (Year 3)

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In this foundation level worksheet, children will solve various word problems with fractions. They could work independently to complete all the questions, or alternatively take it in turns to answer a problem before their partner checks their answer and sees if they agree.

An answer sheet is provided.

Equivalent standard and stretch level resources are also available.

  • Key Stage: Key Stage 2
  • Subject: Maths
  • Topic: Fraction Calculations
  • Topic Group: Fractions, Decimals and Percentages
  • Year(s): Year 3
  • Media Type: PDF
  • Resource Type: Worksheet
  • Last Updated: 24/10/2023
  • Resource Code: M2WFT532
  • Curriculum Point(s): Solve problems that involve fractions.

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Year 3 Fraction Word Problems

Year 3 Fraction Word Problems

Subject: Mathematics

Age range: 7-11

Resource type: Worksheet/Activity

rachel0704

Last updated

22 February 2018

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Gareth Mottram

Great selection and good differentiation sheet. Answers would have been nice to save even more time but thanks for doing this.

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Great for my highers. Thanks.

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Year 3 Maths Worksheets UK Hub Page

Welcome to our Year 3 Maths Worksheets area. Here you will find links to our Year 3 Math worksheets for your child will enjoy.

Come and take a look at our multiplication pages, or money flashcards. Perhaps you would prefer our telling the time worksheets, maths games or identifying 2d and 3d shapes in the geometry section?

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  • This page contains links to other Math webpages where you will find a range of activities and resources.
  • If you can't find what you are looking for, try searching the site using the Google search box at the top of each page.

Year 3 Maths Learning

Here are some of the key learning objectives for the end of Year 3:

  • know and use Place value up to 1000
  • Compare and order numbers up to 1000
  • Counting on and back in 1s, 10s and 100s from different starting points
  • Position numbers on a number line up to 1000
  • know addition and subtraction facts to 20
  • add or subtract 1s, 10s or 100s from a 3-digit number
  • subtract 2- and 3-digit numbers in columns
  • solve problems using addition and subtraction
  • count from 0 in multiplies of 4, 8, 50 and 100
  • recall and use multiplication and division facts from the 2, 3, 4, 5, 8 and 10 times tables
  • multiply 2-digit numbers by a 1-digit number
  • solve problems using multiplication and division
  • count up and down in tenths
  • understand tenths as decimals
  • recognise and use fractions as numbers
  • understand and use fractions of objects or shapes
  • add and subtract amounts of money
  • use £ and p notation correctly
  • measure, compare, add and subtract lengths, mass and volume
  • measure the perimeter of simple 2D shapes
  • tell the time from an analogue clock
  • convert between 12- and 24-hour clock
  • measure and compare times
  • Identify angles including right angles
  • identify acute and obtuse angles
  • identify horizontal, vertical, parallel and perpendicular lines
  • recognise and draw 2D and 3D shapes
  • interpret and present data in bar graphs, pictograms and tables
  • solve 1-step and 2-step problems using data in tables, pictograms and graphs

Please note:

Our site is mainly based around the US Elementary school math standards.

Though the links on this page are all designed primarily for students in the US, but they are also at the correct level and standard for UK students.

The main issue is that some of the spelling is different and this site uses US spelling.

Year 3 is generally equivalent to 2nd Grade in the US.

On this page you will find link to our range of math worksheets for Year 3.

Quicklinks to Year 3 ...

  • Place Value Zone
  • Mental Math Zone

Word Problems Zone

Fractions zone.

  • Measurement Zone

Geometry Zone

Data analysis zone.

  • Fun Zone: games and puzzles

Coronavirus Stay At Home Support

For those parents who have found themselves unexpectedly at home with the kids and need some emergency activities for them to do, we have started to develop some Maths Grab Packs for kids in the UK.

Each pack consists of at least 10 mixed math worksheets on a variety of topics to help you keep you child occupied and learning.

The idea behind them is that they can be used out-of-the-box for some quick maths activities for your child.

They are completely FREE - take a look!

  • Free Maths Grabs Packs

Place Value & Number Sense Zone

Year 3 place value charts.

Here you will find a range of Free Printable Number Charts for Years 2 & 3.

These printable charts will help your child learn to read and write numbers.

Some of the charts are partially filled to help your child learn their place value.

Using these sheets will help your child to:

  • learn to count in tens and ones;
  • learn to read and write numbers.
  • Printable Number Charts 0-99
  • Hundred Number Charts (100 Squares)
  • Number Grid up to 200
  • Number Grid up to 300

Place Value & Counting Worksheets

Below are our selection of Place Value, Ordering and Rounding Worksheets

Using these Year 3 Maths worksheets will help your child to:

  • learn to count by hundreds, tens, fives, twos and ones;
  • learn their place value to Hundreds;
  • order numbers to 999.
  • Place Value Models and Representations
  • Place Value Worksheets 3 Digits
  • Math Practice - Counting by 1s 2s 5s 10s 100s

Ordering and Rounding Worksheets (3-digits)

Once your child is confident with their place value to hundreds, they can start learning about ordering and rounding numbers.

The Year 3 Maths worksheets here will help your child learn to compare numbers to 999, and round numbers to the nearest 10.

  • Ordering Numbers Worksheets up to 3-Digits

Year 3 Number Line Worksheets

The following webpages involve correctly placing numbers on a number line.

Using these Year 3 maths worksheets will help your child to:

  • count by 1s 2s 5s 10s 50s and 100s;
  • position numbers on a number line;
  • understand place value up to 3 digits.
  • Number lines up to 100 (easier)
  • Number Line Worksheets 3 Digits

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Year 3 Mental Maths Zone

Here you will find a range of printable mental math sheets for Year 3 to enjoy.

Each quiz tests the children on a range of math topics from number facts and mental arithmetic to geometry, fraction and measures questions.

A great way to revise topics, or use as a weekly math test or math quiz!

  • Year 3 Mental Maths Worksheets Series A
  • Year 3 Mental Maths Worksheets Series B

Year 3 Addition Worksheets

  • learn their addition facts to 20+20
  • learn how to solve addition sums where one of the addends is missing, but the total is given;
  • learn to add numbers to 999 in columns.
  • Number Bonds to 20
  • Math Addition Facts to 20
  • 2 Digit Column Addition Without Regrouping
  • 2 Digit Column Addition Worksheets With Regrouping
  • 3 Digit Column Addition Worksheets

Year 3 Subtraction Worksheets

The following worksheets involve using the skills of subtracting numbers, and solving subtraction problems.

  • know their subtraction facts to 20;
  • know how addition and subtraction are related to each other;
  • learn to do 3 digit column subtraction.
  • Subtraction Facts to 20 Worksheets
  • Two Digit Subtraction Worksheets Without Regrouping
  • 2 Digit Subtraction Worksheets With Regrouping
  • 3 Digit Subtraction Worksheets

Addition & Subtraction Worksheets

You can create your own addition and subtraction worksheets with our random generator.

All you need to do is to set your number size and let the generator do the rest!

  • Addition Subtraction Fact Worksheets
  • Column Addition and Subtraction Worksheets

Year 3 Multiplication Worksheets

The following worksheets involve using the Year 3 Maths skills of multiplying, and solving multiplication problems.

  • learn their multiplication tables up to 5 x 5;
  • understand multiplication as repeated addition;
  • learn how multiplication and division are related to each other.

Online Times Table Practice

  • Times Tables Online Practice Zone
  • Understanding Multiplication Worksheets
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  • Printable Times Tables - 3 Times Table sheets
  • Times Tables for kids - 4 Times Table sheets
  • Times Table Math - 5 Times Table sheets
  • Learning Times Tables - 8 Times Table

Multiplication Word Problems

  • Year 3 Multiplication Word Problems (2nd Grade)

Randomly Generated Multiplication Worksheets

  • Times Tables Worksheets (randomly generated)

2 Digit by 1 Digit Written Multiplication

  • Multiplication Worksheets for 3rd Grade 2-digits by 1-digit
  • Year 3 Division Worksheets

The following worksheets involve using the skills of dividing, and solving division problems.

Using these Year 3 maths worksheets will help your child learn to:

  • understand division as repeated subtraction or sharing;
  • understand different models of division;
  • Division Facts Worksheets (randomly generated)

Here are a range of problems solving sheets for Year 3 children. Most of the sheets contain 'real-life' problems related to animal facts.

Using the sheets will help your child to:

  • apply their addition, subtraction, and multiplication skills;
  • apply their knowledge of rounding and place value;
  • solve a range of 'real life' problems.

These sheets involve solving one or two more challenging longer problems. This link opens in a new tab.

  • Year 3 Maths Challenges

These sheets involve solving many 'real-life' problems involving data.

  • Year 3 Math Word Problems

These sheets involve solving a range of addition word problems within 100.

  • Addition Word Problems 2nd grade

These sheets involve solving a range of subtraction word problems up to 100.

  • Subtraction Word Problems 2nd grade
  • 2nd Grade Addition and Subtraction Word Problems

These sheets involve solving a range of multiplication problems.

  • Multiplication Word Problems Year 3

Year 3 Fraction Worksheets

  • understand what a half is;
  • shade in half of a shape;
  • find different numbers involving 'halves' on a number line;
  • find half of different numbers up to 20.
  • Fraction Math Worksheets - Understanding a half
  • Fraction Riddles for kids (easier)

Year 3 Geometry Worksheets

At a Year 3 level, children are introduced to a wider range of 2d and 3d shapes, and start to learn to reflect, flip and rotate shapes.

They are able to classify and sort two-dimensional shapes using different criteria, and they learn the properties of three-dimensional shapes.

The following worksheets will help your child to:

  • Identify and name a range of 2d and 3d shapes;
  • Draw 2d shapes;
  • Know some of the properties of 2d shapes.
  • Year 3 Geometry Worksheets (2nd Grade)

Symmetry Worksheets

  • learn how to reflect simple shapes in a horizontal or vertical mirror line;
  • learn how to reflect simple shapes in 2 mirror lines.
  • Symmetry Worksheets - Block Symmetry

Measurement Zone, including Time & Money

Year 3 measurement worksheets.

These sheets involve reading scales going up in ones, fives, tens and hundreds to find the length, weight or liquid capacity.

Using these sheets will help children to consolidate their counting as well as learning to read a simple scale.

  • Year 3 Measurement Worksheets (2nd Grade)

Counting Money Worksheets UK - £2, £1, 50p and 20p coins

Here you will find a selection of Counting Money sheets designed to help your child count different amounts of money using UK coins up to £2.

  • count a range of coins up to £5
  • compare money amounts
  • apply their existing skills to puzzle out clues;
  • understand money terminology;
  • develop their thinking skills.

The free Year 3 Money worksheets in this section are suitable for children in Years 2 and 3.

  • Free Money Worksheets UK Coins up to £1
  • Year 3 Money Worksheets to £5
  • Money Riddles for Kids (UK coins)
  • Year 3 Money Challenges

Time Worksheets

Here are our collection of clock worksheets for Year 3. These sheets cover telling the time for quarter past and quarter to times.

  • read times to the nearest 5 minutes;
  • convert analogue to digital times;
  • adding and subtracting hours from different times.
  • Clock Worksheets - Quarter Past and Quarter To
  • Telling Time to 5 Minutes Worksheets
  • Add and Subtract Time Worksheets

Year 3 Bar Graph Worksheets

These sheets involve reading and interpreting a range of bar graphs and picture graphs with a scale going up in ones or twos.

Draw missing bars on a bar graph to the correct height.

Use the information in a bar graph to add data into a table.

Using the link below will open the 2nd grade Math Salamanders website in a new browser window.

  • Year 3 Bar Graphs (2nd Grade)

Fun Zone: Puzzles, Games and Riddles

Year 3 math games.

All children like to play Math games, and you will find a good range of 2nd Grade Math Games here for your child to play and enjoy.

The following games involve different Second Grade Math activities which you and your child can enjoy together.

  • Year 3 Math Games (2nd Grade)
  • Year 3 Maths Puzzles

The puzzles will help your child practice and apply their addition, subtraction and multiplication facts as well as developing their thinking and reasoning skills in a fun and engaging way.

The Number Square Puzzles page will open a new browser window which will take you to the 2nd grade math salamanders website.

Using these puzzles will help your child to:

  • learn their addition facts to 20+20;
  • learn and practice subtraction facts to 20;
  • pratice multiplying up to 5x5;
  • develop thinking and reasoning skills;
  • develop perseverance.
  • Number Square Puzzles
  • Math Puzzles at 2nd Grade Math Salamanders

Math Salamanders Year 3 Maths Games Ebook

Our Year 3 Maths Games Ebook contains all of our fun maths games, complete with instructions and resources.

This ebooklet is available in our store, use the link below to find out more!

  • Year 3 Maths Games Ebook

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  • 20 March 2024
  • Correction 21 March 2024

Mathematician who tamed randomness wins Abel Prize

  • Davide Castelvecchi

You can also search for this author in PubMed   Google Scholar

You have full access to this article via your institution.

Michel Talagrand.

Michel Talagrand studies stochastic processes, mathematical models of phenomena that are governed by randomness. Credit: Peter Bagde/Typos1/Abel Prize 2024

A mathematician who developed formulas to make random processes more predictable and helped to solve an iconic model of complex phenomena has won the 2024 Abel Prize, one of the field’s most coveted awards. Michel Talagrand received the prize for his “contributions to probability theory and functional analysis, with outstanding applications in mathematical physics and statistics”, the Norwegian Academy of Science and Letters in Oslo announced on 20 March.

Assaf Naor, a mathematician at Princeton University in New Jersey, says it is difficult to overestimate the impact of Talagrand’s work. “There are papers posted maybe on a daily basis where the punchline is ‘now we use Talagrand’s inequalities’,” he says.

Talagrand’s reaction on hearing the news was incredulity. “There was a total blank in my mind for at least four seconds,” he says. “If I had been told an alien ship had landed in front of the White House, I would not have been more surprised.”

The Abel Prize was modelled after the Nobel Prizes — which do not include mathematics — and was first awarded in 2003. The recipient wins a sum of 7.5 million Norwegian kroner (US$700,000).

‘Like a piece of art’

Talagrand specializes in the theory of probability and stochastic processes, which are mathematical models of phenomena governed by randomness. A typical example is a river’s water level, which is highly variable and is affected by many independent factors, including rain, wind and temperature, Talagrand says. His proudest achievement was his inequalities 1 , a set of formulas that poses limits to the swings in stochastic processes. His formulas express how the contributions of many factors often cancel each other out — making the overall result less variable, not more.

“It’s like a piece of art,” says Abel-committee chair Helge Holden, a mathematician at the Norwegian University of Science and Technology in Trondheim. “The magic here is to find a good estimate, not just a rough estimate.”

solve fraction problems year 3

Abel Prize: pioneer of ‘smooth’ physics wins top maths award

Thanks to Talagrand’s techniques, “many things that seem complicated and random turn out to be not so random”, says Naor. His estimates are extremely powerful, for example for studying problems such as optimizing the route of a delivery truck. Finding a perfect solution would require an exorbitant amount of computation, so computer scientists can instead calculate the lengths of a limited number of random candidate routes and then take the average — and Talagrand’s inequalities ensure that the result is close to optimal.

Talagrand also completed the solution to a problem posed by theoretical physicist Giorgio Parisi — work that ultimately helped Parisi to earn a Nobel Prize in Physics in 2021. In 1979, Parisi, now at the University of Rome, proposed a complete solution for the structure of a spin glass — an abstracted model of a material in which the magnetization of each atom tends to flip up or down depending on those of its neighbours.

Parisi’s arguments were rooted in his powerful intuition in physics, and followed steps that “mathematicians would consider as sorcery”, Talagrand says, such as taking n copies of a system — with n being a negative number. Many researchers doubted that Parisi’s proof could be made mathematically rigorous. But in the early 2000s, the problem was completely solved in two separate works, one by Talagrand 2 and an earlier one by Francesco Guerra 3 , a mathematical physicist who is also at the University of Rome.

Finding motivation

Talagrand’s journey to becoming a top researcher was unconventional. Born in Béziers, France, in 1952, he lost vision in his right eye at age five because of a genetic predisposition to detachment of the retina. Although while growing up in Lyon he was a voracious reader of popular science magazines, he struggled at school, particularly with the complex rules of French spelling. “I never really made peace with orthography,” he told an interviewer in 2019 .

His turning point came at age 15, when he received emergency treatment for another retinal detachment, this time in his left eye. He had to miss almost an entire year of school. The terrifying experience of nearly losing his sight — and his father’s efforts to keep his mind busy while his eyes were bandaged — gave Talagrand a renewed focus. He became a highly motivated student after his recovery, and began to excel in national maths competitions.

solve fraction problems year 3

Just 5 women have won a top maths prize in the past 90 years

Still, Talagrand did not follow the typical path of gifted French students, which includes two years of preparatory school followed by a national admission competition for highly selective grandes écoles such as the École Normale Supérieure in Paris. Instead, he studied at the University of Lyon, France, and then went on to work as a full-time researcher at the national research agency CNRS, first in Lyon and later in Paris, where he spent more than a decade in an entry-level job. Apart from a brief stint in Canada, followed by a trip to the United States where he met his wife, he worked at the CNRS until his retirement.

Talagrand loves to challenge other mathematicians to solve problems that he has come up with — offering cash to those who do — and he keeps a list of those problems on his website. Some have been solved, leading to publications in major maths journals . The prizes come with some conditions: “I will award the prizes below as long as I am not too senile to understand the proofs I receive. If I can’t understand them, I will not pay.”

Nature 627 , 714-715 (2024)

doi: https://doi.org/10.1038/d41586-024-00839-6

Updates & Corrections

Correction 21 March 2024 : An earlier version of this article stated that Giorgio Parisi won the Nobel Prize in Physics in 2001. He in fact won in 2021.

Talagrand, M. Publ. Math. IHES 81 , 73–205, (1995).

Article   Google Scholar  

Talagrand, M. Ann. Math. 163 , 221–263 (2006).

Guerra, F. Commun. Math. Phys. 233 , 1–12 (2003).

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Netflix's hit sci-fi series '3 Body Problem' is based on a real math problem that is so complex it's impossible to solve

  • The three-body problem is a centuries-old physics question that puzzled Isaac Newton .
  • It describes the orbits of three bodies, like planets or stars, trapped in each other's gravity.
  • The problem is unsolvable and led to the development of chaos theory.

Insider Today

While Netflix's "3 Body Problem" is a science-fiction show, its name comes from a real math problem that's puzzled scientists since the late 1600s.

In physics, the three-body problem refers to the motion of three bodies trapped in each other's gravitational grip — like a three-star system.

It might sound simple enough, but once you dig into the mathematics, the orbital paths of each object get complicated very quickly.

Two-body vs. three- and multi-body systems

A simpler version is a two-body system like binary stars. Two-body systems have periodic orbits, meaning they are mathematically predictable because they follow the same trajectory over and over. So, if you have the stars' initial positions and velocities, you can calculate where they've been or will be in space far into the past and future.

However, "throwing in a third body that's close enough to interact leads to chaos," Shane Ross, an aerospace and ocean engineering professor at Virginia Tech, told Business Insider. In fact, it's nearly impossible to precisely predict the orbital paths of any system with three bodies or more.

While two orbiting planets might look like a ven diagram with ovular paths overlapping, the paths of three bodies interacting often resemble tangled spaghetti. Their trajectories usually aren't as stable as systems with only two bodies.

All that uncertainty makes what's known as the three-body problem largely unsolvable, Ross said. But there are certain exceptions.

The three-body problem is over 300 years old

The three-body problem dates back to Isaac Newton , who published his "Principia" in 1687.

In the book, the mathematician noted that the planets move in elliptical orbits around the sun. Yet the gravitational pull from Jupiter seemed to affect Saturn's orbital path.

Related stories

The three-body problem didn't just affect distant planets. Trying to understand the variations in the moon's movements caused Newton literal headaches, he complained.

But Newton never fully figured out the three-body problem. And it remained a mathematical mystery for nearly 200 years.

In 1889, a Swedish journal awarded mathematician Henri Poincaré a gold medal and 2,500 Swedish crowns, roughly half a year's salary for a professor at the time, for his essay about the three-body problem that outlined the basis for an entirely new mathematical theory called chaos theory .

According to chaos theory, when there is uncertainty about a system's initial conditions, like an object's mass or velocity, that uncertainty ripples out, making the future more and more unpredictable.

Think of it like taking a wrong turn on a trip. If you make a left instead of a right at the end of your journey, you're probably closer to your destination than if you made the mistake at the very beginning.

Can you solve the three-body problem?

Cracking the three-body problem would help scientists chart the movements of meteors and planets, including Earth, into the extremely far future. Even comparatively small movements of our planet could have large impacts on our climate, Ross said.

Though the three-body problem is considered mathematically unsolvable, there are solutions to specific scenarios. In fact, there are a few that mathematicians have found.

For example, three bodies could stably orbit in a figure eight or equally spaced around a ring. Both are possible depending on the initial positions and velocities of the bodies.

One way researchers look for solutions is with " restricted " three-body problems, where two main bodies (like the sun and Earth) interact and a third object with much smaller mass (like the moon) offers less gravitational interference. In this case, the three-body problem looks a lot like a two-body problem since the sun and Earth comprise the majority of mass in the system.

However, if you're looking at a three-star system, like the one in Netflix's show "3 Body Problem," that's a lot more complicated.

Computers can also run simulations far more efficiently than humans, though due to the inherent uncertainties, the results are typically approximate orbits instead of exact.

Finding solutions to three-body problems is also essential to space travel, Ross said. For his work, he inputs data about the Earth, moon, and spacecraft into a computer. "We can build up a whole library of possible trajectories," he said, "and that gives us an idea of the types of motion that are possible."

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The 3-body problem is real, and it’s really unsolvable

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Rosalind Chao as Ye Wenjie standing in the middle of three overlapping circles

Everybody seems to be talking about 3 Body Problem , the new Netflix series based on Cixin Liu’s Remembrance of Earth’s Past book trilogy . Fewer people are talking about the two series’ namesake: The unsolvable physics problem of the same name.

This makes sense, because it’s confusing . In physics, the three-body problem attempts to find a way to predict the movements of three objects whose gravity interacts with each of the others — like three stars that are close together in space. Sounds simple enough, right? Yet I myself recently pulled up the Wikipedia article on the three-body problem and closed the tab in the same manner that a person might stagger away from a bright light. Apparently the Earth, sun, and moon are a three-body system? Are you telling me we don’t know how the moon moves ? Scientists have published multiple solutions for the three-body problem? Are you telling me Cixin Liu’s books are out of date?

All I’d wanted to know was why the problem was considered unsolvable, and now memories of my one semester of high school physics were swimming before my eyes like so many glowing doom numbers. However, despite my pains, I have readied several ways that we non-physicists can be confident that the three-body problem is, in fact, unsolvable.

Reason 1: This is a special definition of ‘unsolvable’

Jin Cheng (Jess Hong) holds up an apple in a medieval hall in 3 Body Problem.

The three-body problem is extra confusing, because scientists are seemingly constantly finding new solutions to the three-body problem! They just don’t mean a one-solution-for-all solution. Such a formula does exist for a two-body system, and apparently Isaac Newton figured it out in 1687 . But systems with more than two bodies are, according to physicists, too chaotic (i.e., not in the sense of a child’s messy bedroom, but in the sense of “chaos theory”) to be corralled by a single solution.

When physicists say they have a new solution to the three-body problem, they mean that they’ve found a specific solution for three-body systems that have certain theoretical parameters. Don’t ask me to explain those parameters, because they’re all things like “the three masses are collinear at each instant” or “a zero angular momentum solution with three equal masses moving around a figure-eight shape.” But basically: By narrowing the focus of the problem to certain arrangements of three-body systems, physicists have been able to derive formulas that predict the movements of some of them, like in our solar system. The mass of the Earth and the sun create a “ restricted three-body problem ,” where a less-big body (in this case, the moon) moves under the influence of two massive ones (the Earth and the sun).

What physicists mean when they say the three-body problem has no solution is simply that there isn’t a one-formula-fits-all solution to every way that the gravity of three objects might cause those objects to move — which is exactly what Three-Body Problem bases its whole premise on.

Reason 2: 3 Body Problem picked an unsolved three-body system on purpose

A woman floating in front of three celestial bodies (ahem) in 3 Body Problem

Henri Poincaré’s research into a general solution to the three-body problem formed the basis of what would become known as chaos theory (you might know it from its co-starring role in Jurassic Park ). And 3 Body Problem itself isn’t about any old three-body system. It’s specifically about an extremely chaotic three-body system, the exact kind of arrangement of bodies that Poincaré was focused on when he showed that the problem is “unsolvable.”

[ Ed. note: The rest of this section includes some spoilers for 3 Body Problem .]

In both Liu’s books and Netflix’s 3 Body Problem , humanity faces an invasion by aliens (called Trisolarans in the English translation of the books, and San-Ti in the TV series) whose home solar system features three suns in a chaotic three-body relationship. It is a world where, unlike ours, the heavens are fundamentally unpredictable. Periods of icy cold give way to searing heat that give way to swings in gravity that turn into temporary reprieves that can never be trusted. The unpredictable nature of the San-Ti environment is the source of every detail of their physicality, their philosophy, and their desire to claim Earth for their own.

In other words, 3 Body Problem ’s three-body problem is unsolvable because Liu wanted to write a story with an unsolvable three-body system, so he chose one of the three-body systems for which we have not discovered a solution, and might never.

Reason 3: Scientists are still working on the three-body problem

Perhaps the best reason I can give you to believe that the three-body problem is real, and is really unsolvable, is that some scientists published a whole set of new solutions for specific three-body systems very recently .

If physicists are still working on the three-body problem, we can safely assume that it has not been solved. Scientists, after all, are the real experts. And I am definitely not.

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    In this pack, you'll find 9 x Year 3 fraction word problems and a full answer sheet. Each fraction word problem is illustrated and based on something your pupils will be familiar with (favourite foods, family, sports and games). Real-world examples like these help children visualise the fractions, which makes it easier for them to apply their learning and solve the problems. These ...

  2. PDF Year 3 Fraction of an Amount Reasoning and Problem Solving

    Mathematics Year 3: (3F3) Compare and order unit fractions, and fractions with the same denominators Differentiation: Questions 1, 4 and 7 (Problem Solving) Developing Calculate the amount spent and total left when finding fractions of an amount up to £50 using denominations of 2, 3, 5, and 10 with pictorial support and no exchanging.

  3. 3rd Grade Fraction Word Problems

    These printable worksheets have grade 3 word problems related to identifying and/or comparing fractions. They also provide practice in simplifying fractions. Both fractions and mixed numbers are used. Worksheet #1 Worksheet #2 Worksheet #3 Worksheet #4. Worksheet #5 Worksheet #6.

  4. Fraction Worksheets for Year 3 (age 7-8)

    Over 50 pages of fraction worksheets for year 3. Finding tenths of numbers, equivalence, adding and subtracting fractions. Take a look now. ... Solving word problems with fractions Solving word problems involving fractions. Adding and subtracting fractions. Begin to add and subtract fractions with the same denominator. ...

  5. PDF Year 3 Add Fractions Reasoning and Problem Solving

    Mathematics Year 3: (3F4) Add and subtract fractions with the same denominator within one whole [for example, 5/7 + 1/7 = 6/7 ] Mathematics Year 3: (3F10) Solve problems that involve the above objectives.

  6. Solving Year 3 Fraction Problems

    year 3 english. Tailor your maths lessons to meet the objectives of the new KS2 national curriculum with our wonderful library of year 3 fraction problems resources. All of our fraction problem-solving resources are designed to meet the 2014 national curriculum objective of "solve problems that involve all of the above".

  7. Fractions in Year 3 (age 7-8)

    Here are just a few ideas. 1. Make fraction snowflakes. Paper folding can be a great way to explore fractions. Decorate a piece of paper or card and then ask your child to fold the paper into different equal parts. For example, they could fold the paper into fifths by creating five equal sections. Ask them to show you a fifth, two-fifths, three ...

  8. Year 3 Fractions

    Finding 1/2, 1/4, 3/4, 1/3, 2/3 of amounts - Problem-Solving Investigation - Year 3. These in-depth maths investigations are open-ended problem solving activities for Year 3 children. In-depth Investigation: Fraction Clues. Children use their knowledge of fractions and tables to find mystery numbers. In-depth Investigation: Fraction Bets.

  9. Year 3

    In these Year 3 solving fraction problems worksheets, your learners will embark on a journey of real-world word problems, utilising their knowledge of fractions to find the answers.. In these Year 3 solving fraction problems worksheets, children are encouraged to actively apply their understanding of fractions to solve a diverse set of word problems.

  10. Problem Solving with Fractions: Foundation (Year 3)

    Problem Solving with Fractions: Foundation (Year 3) In this foundation level worksheet, children will solve various word problems with fractions. They could work independently to complete all the questions, or alternatively take it in turns to answer a problem before their partner checks their answer and sees if they agree.

  11. Year 3 Fraction Word Problems

    File previews. docx, 14.57 KB. doc, 24.5 KB. docx, 14.31 KB. Differentiated fraction word problems for year 3. Problems involve single step and multi-step.

  12. PDF Year 3 Fraction of an Amount 3 Reasoning and Problem Solving

    National Curriculum Objectives: Mathematics Year 3: (3F1b) Recognise, find and write fractions of a discrete set of objects: unit fractions Mathematics Year 3: (3F1c) Recognise and use fractions as numbers: unit fractions and non-unit fractions with small denominators Mathematics Year 3: (3F10) Solve problems that involve 3F1 - 3F4.

  13. Word Problems Year 3 Fractions

    Word Problems Year 3 Fractions. Help your pupils apply their understanding of fractions to an unfamiliar context using these worded problems. 11 questions to develop reasoning and problem solving skills. This worksheet contains 10 fractions questions of ascending difficulty plus one challenge question. An answer sheet is included.

  14. Year 3 Maths Worksheets

    Year 3 Addition Worksheets. Using these Year 3 maths worksheets will help your child to: learn their addition facts to 20+20. learn how to solve addition sums where one of the addends is missing, but the total is given; learn to add numbers to 999 in columns. Number Bonds to 20. Math Addition Facts to 20.

  15. PDF Year 3 Subtract Fractions Reasoning and Problem Solving

    National Curriculum Objectives: Mathematics Year 3: (3F4) Add and subtract fractions with the same denominator within one whole [for example, 5/7 + 1/7 = 6/7 ] Mathematics Year 3: (3F10) Solve problems that involve the above objectives. Differentiation: Questions 1, 4 and 7 (Problem Solving) Developing Subtract fractions using a visual image ...

  16. PDF Year 3 Compare Fractions Reasoning and Problem Solving

    Greater Depth Explain reasons for agreeing or disagreeing with a statement. Comparing unit fractions or fractions with the same denominator within twelfths using knowledge of equivalent fractions. Some pictorial support. Questions 2, 5 and 8 (Problem Solving) Developing Complete the sequence. Comparing unit fractions or fractions with the same ...

  17. Year 3 Maths Word Problems

    This Year 3 Maths Problems pack contains 16 challenge cards with a range of questions for children to answer. It also features an answer sheet to help you quickly check their work afterwards.This resource is perfect for sparking children's interest in maths. That's because the practical aspect of these maths word problems for year 3 is bound to make learning more fun and engaging.Children ...

  18. PDF Puzzles and problems for Years 3 and 4

    Explain methods and reasoning. Make each pond hold two ducks or five ducks. Make each pond hold twice as many ducks as the one before. Make each pond hold one less duck than the one before. Solve mathematical problems or puzzles. Know multiplication facts for 2 and 5 times tables. Add three or four small numbers.

  19. Word Problems For Year 3 To Improve Problem Solving Skills

    We have put together a collection of 20 word problems, aimed at Year 3 pupils. Years 3 to 6 Rapid Reasoning (Weeks 1-6) Download this free pack of word problems to improve your class' problem solving skills. Includes questions for Years 3 - 6. Download Free Now!

  20. Mathematician who tamed randomness wins Abel Prize

    But in the early 2000s, the problem was completely solved in two separate works, one by Talagrand 2 and an earlier one by Francesco Guerra 3, a mathematical physicist who is also at the University ...

  21. Why the Three-Body Problem in Physics Is Unsolvable

    While Netflix's "3 Body Problem" is a science-fiction show, its name comes from a real math problem that's puzzled scientists since the late 1600s. In physics, the three-body problem refers to the ...

  22. PDF Year 3 Equivalent Fractions 3 Reasoning and Problem Solving

    Greater Depth Spot the errors in a row of equivalent fractions and explain the answer. Including fractions that are equivalent to simplified fractions up to twelfths, where the simplified fraction is not always given. Questions 3, 6 and 9 (Problem solving) Developing Use a set of digit cards to make an equivalent fraction to the one given.

  23. What is the 3-body problem, and why is it unsolvable?

    The whole point of Netflix's 3 Body Problem, based on Cixin Liu's book trilogy, is that the three-body problem is unsolvable by physicists. ... Oh god don't make me explain math. By Susana ...

  24. Hamas Took Her, and Still Has Her Husband

    The story of one family at the center of the war in Gaza.

  25. The Newest Tech Start-Up Billionaire? Donald Trump

    The Sunday Read: 'My Goldendoodle Spent a Week at Some Luxury Dog 'Hotels.' I Tagged Along.'