Addition and Subtraction

Related Worksheets

Birds v Robots - Maths Battle
Help the birds defend their eggs from the evil robots by answering the maths questions correctly.

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Birds v Robots - Maths Battle ?
Addition - Mini Maths Golf
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Addition - Mini Maths Golf ?
Balancing Sums
An excellent tool for reinforcing an understanding of the role of the equals sign. Choose one objective, or many. You can choose all the objectives for a single year group (or multiple year groups). You can also choose to balance between different types of calculations (eg addition and multiplication).

For more addition and subtraction resources click here.

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Balancing Sums ?
Addition - Maths Road Hopper
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Addition - Maths Road Hopper ?
Super Maths Bowling - Addition
Answer the addition questions quickly and correctly and you will be able to aim more accurately at the pins.

Choose from the following levels:

1) Add numbers up to 10 (Y1)

2) Add numbers up to 20 (Y1)

3) Add a two-digit number and ones (Y2)

4) Add a two-digit number and tens (Y2)

5) Add two two-digit numbers (Y2)

6) Add three one-digit numbers (Y2)

7) Addition pairs that make 100 (multiples of 10) (Y3)

8) Addition pairs that make 100 (multiples of 5) (Y3))

9) Addition pairs that make 100 (Y3 & Y4)

10) Add pairs that make 1000 (multiples of 100) (Y3 & Y4)

11) Add a three-digit number and ones (Y3)

12) Add a three-digit number and tens (Y3)

13) Add a three-digit number and hundreds (Y3)

14) Add pairs of decimals (1dp) that make 1 (Y4 & Y5)

15) Add pairs of decimals (1dp) that make 10 (Y4 & Y5)

16) Add combinations of two and three digit numbers (y4)

17) Add combinations of decimals (1dp) (Y4)

18) Add pairs of decimals (2dp) that make 1 (Y5 & Y6)

19) Add combinations of three-digit numbers (Y5 & Y6)

20) Add combinations of decimals (2dp) (Y5 & Y6)

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Super Maths Bowling - Addition ?
Difference using an unmarked number line
Find the difference between two numbers by counting on from the smaller number to the larger number. Children must add the fewest numbers possible, so are encouraged to develop more efficient mental methods. The addition is also shown as jumps on a number line.

Levels include counting up to 10, 20, 50 or 100, finding the difference between 2-digit numbers, 3-digit numbers and decimals.

For more addition and subtraction resources click here.

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Online in HTML5 format
Difference using an unmarked number line ?
Maths Maze Monsters - Addition
Answer the addition questions correctly and you will grow and can eat your opponent and steal their points. Choose one player or two player mode. If you are playing on a tablet then you will need to lock it to portrait mode first.

Choose from the following levels:

1) Add numbers up to 10 (Y1)

2) Add numbers up to 20 (Y1)

3) Add a two-digit number and ones (Y2)

4) Add a two-digit number and tens (Y2)

5) Add two two-digit numbers (Y2)

6) Add three one-digit numbers (Y2)

7) Addition pairs that make 100 (multiples of 10) (Y3)

8) Addition pairs that make 100 (multiples of 5) (Y3))

9) Addition pairs that make 100 (Y3 & Y4)

10) Add pairs that make 1000 (multiples of 100) (Y3 & Y4)

11) Add a three-digit number and ones (Y3)

12) Add a three-digit number and tens (Y3)

13) Add a three-digit number and hundreds (Y3)

14) Add pairs of decimals (1dp) that make 1 (Y4 & Y5)

15) Add pairs of decimals (1dp) that make 10 (Y4 & Y5)

16) Add combinations of two and three digit numbers (y4)

17) Add combinations of decimals (1dp) (Y4)

18) Add pairs of decimals (2dp) that make 1 (Y5 & Y6)

19) Add combinations of three-digit numbers (Y5 & Y6)

20) Add combinations of decimals (2dp) (Y5 & Y6)

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Maths Maze Monsters - Addition ?
Number Bonds Check
This activity uses the same format as the 'Multiplication Tables Check'. It tests recall of number bonds to 10, 20, 50, 100 or 1000 or decimal bonds to 1. The number of questions and the amount of time given can be adjusted. Results can be downloaded and printed at the end.

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Number Bonds Check ?
Expanded Addition Using Place Value Counters - Tablet Version
A step towards a more formal written method of columnar addition using place value counters. This version will work on an iPad or any tablet.

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Expanded Addition Using Place Value Counters - Tablet Version ?
Subtraction - Maths Road Hopper
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Subtraction - Maths Road Hopper ?
Mini Maths Motors - Addition
Steer your car to the correct answer before you run out of fuel.

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Mini Maths Motors - Addition ?
Column Subtraction Using Place Value Counters - Tablet Version
A tablet firendly version of 'Column Subtraction using Place Value Counters'. A good starting place for teaching column subtraction. Helps children to visualise the processes involved. Choose either expanded subtraction or column subtraction, with or without the need for borrowing.

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Column Subtraction Using Place Value Counters - Tablet Version ?
Tommy's Trek - Subtraction
For more Tommy's Trek games click here.

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Tommy's Trek - Subtraction ?
Jetpack Mathematics - Addition
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Jetpack Mathematics - Addition ?
Inverse Operations - Addition and Subtraction
I designed this resource to help children to visualise the relationship between addition and subtraction. They can then use this relationship to solve missing number problems. There are a wide range of levels, from adding within 20 to using a calculator to add and subtract 5 digit numbers and decimals.

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Inverse Operations - Addition and Subtraction ?
Parking Maths - Addition
Park your car on the space with the correct answer. Choose from the following levels:

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Parking Maths - Addition ?
Archery Arithmetic - Subtraction
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Archery Arithmetic - Subtraction ?
Subtraction - Mini Maths Motors
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Subtraction - Mini Maths Motors ?
Interactive Maths Quiz
Choose the obectives you wish to cover and the level (working towards the expected standard, working at the expected standard or greater depth). Results can be printed at the end. The quiz will work on any device, including iPads.

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Interactive Maths Quiz ?
Tommy's Trek - Addition
A fun platformer game that helps develop addition skills. Lots of choice over level. This game will work on any device.

Use the arrow keys to move Tommy. The ctrl key makes him jump and the up arrow selects a number.

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Tommy's Trek - Addition ?
Snowball Smash
Answer the maths questions and then see how many opponents you can defeat in a snowball fight.

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Snowball Smash ?
Marlon's Magical Maths Mission - Addition
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Marlon's Magical Maths Mission - Addition ?
Parking Maths - Subtraction
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Parking Maths - Subtraction ?
Snowboard Slalom
Use the arrow keys to guide the snowboarder to the correct answer. Can you answer 10 questions before the time runs out?

There are over a hundred carefully differentiated levels linked to objectives from the new maths curriculum. The game can be used to teach: Multiplication, Addition, Reading Numbers, Subtraction, Fractions of Numbers, Roman Numerals, Rounding Numbers, Division, Converting Fractions to Decimals, Converting Fractions to Percentages, and Simplifying Fractions. A full list of levels is below.

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Snowboard Slalom ?
Boxy Bird
Answer the maths questions and then help your bird to get home safely.

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Boxy Bird ?
Maths Race - Addition
A fun game to practise mental addition skills. The game was designed to cover all the mental addition objectives in the new math curriculum. You can choose one objective, or choose all the objectives for a year group.

This game will work on any tablet or computer.

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Online in HTML5 format
Maths Race - Addition ?
Addition - Crystal Crash
A fun game to practise mental addition skills. The game was designed to cover all the mental addition objectives in the new math curriculum. You can choose one objective, or choose all the objectives for a year group.

This game will work on any device in your browser.

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Addition - Crystal Crash ?
Bubble Pop - Number Bonds
A great way to practise number bonds and mental addition. Levels include: number bonds to 10, 20, 50 and 100 as well as addition pairs with a total of up to 20, 50 or 100. Look at the target at the top of the screen and then aim your bubble to make that target.

As a teacher I know how important it is that children know their number bonds (pairs of numbers that add up to 10, 20, 50 or 100), and can add quickly mentally. Repetition is essential in learning number bonds. This game is designed to make the process fun.

Children have to aim their bubble to make a given sum. As they progress the levels get harder; they have less time, or less bubbles to shoot. Each correct answer is accompanied by an image to reinforce the number bond they have found.

This game will work directly in the browser of any device.

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Bubble Pop - Number Bonds ?
Maths Maze Monsters - Subtraction
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Maths Maze Monsters - Subtraction ?
Column Subtraction
Working towards an efficent method of column subtraction. Can be used to demonstate expanded subtraction (in which the numbers are partitioned) with or without the need for borrowing.

For more addition and subtraction resources click here.

This game is now part of the 'Calculations' collection, which includes the following 17 games and resources: Column Addition, Expanded Addition, Expanded Addition - Place Value Counters, Number Bonds(2), Addition - Digit Drag, Missing Symbols, Column Subtraction, Column Subtraction using Place Value Counters, Counting on to find difference on a beadstring, Multiplication Grid Method, Multiplication Written Method, Ratio and Scaling Numbers, Representing Multiplication, Division by Chunking Up, Division by Chunking Down, Formal Written Division - Round Up or Down?, Short Division Writen Formal Method.

The Calculations app is available on Google Play and the App Store.

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Column Subtraction ?
Monty's Maths Wall - Tablet Version
Use the arrow keys to guide your brick and destroy the wall or if you are using a tablet, tap either side to direct your brick and both sides to make it fall faster.

A great game for practising a wide range of mathematical skills. Levels are based on objectives from the new maths curriculum from Year 1 to Year 6. Topics include: multiplication, addition, reading numbers, subtraction, fractions of numbers, Roman numerals, division, converting fractions to decimals and percentages and simplifying fractions.

You can choose to play a single level, a selection of levels, or choose all the objectives from a year group (within the same topic). There is a full list of levels below.

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Monty's Maths Wall - Tablet Version ?
Snake - KS2 Maths Game
Use the arrow keys on a computer or swipe on a tablet to guide the snake to the correct answers.

There are more than 100 different levels to play. See below for a full list of levels.

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Snake - KS2 Maths Game ?
KS2 Maths Invaders
** New tablet-friendly version added 14th February 2018. Please let me know if you have any problems - support@mathsframe.co.uk

Shoot the spaceship with the correct answer and dodge the incoming fire. A fun game to practise a wide range of key mathematical skills.

There are over a hundred carefully differentiated levels linked to objectives from the new maths curriculum. The game can be used to teach: Multiplication, Addition, Reading Numbers, Subtraction, Fractions of Numbers, Roman Numerals, Rounding Numbers, Division, Converting Fractions to Decimals, Converting Fractions to Percentages, Telling the Time in Words, Recognising Multiples, Factors, Prime, Square and Cube Numbers, and Simplifying Fractions. A full list of levels is below. This game is also available as an iOS and Android app.

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KS2 Maths Invaders ?
Maths Race - Subtraction
This game was designed to cover all the mental subtraction objectives in the new maths curriculum. You can choose one objective, or choose all the objectives for a year group.

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Maths Race - Subtraction ?
Tower of Mathematics - Addition
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Tower of Mathematics - Addition ?
Subtraction - Crystal Crash
The game was designed to cover all the mental subtraction objectives in the new maths curriculum. You can choose one objective, or choose all the objectives for a year group.

This game will work on any tablet or computer.

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Online in HTML5 format
Subtraction - Crystal Crash ?
Archery Arithmetic - Addition
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Archery Arithmetic - Addition ?
Maths Goalie
Answer the maths questions and then see how many shots you can save.

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Maths Goalie ?
Monty's Maths Memory
Help Monty remember where to find the card with the correct answer. Levels involve: Multiplication, Addition, Reading Numbers, Subtraction, Fractions of Numbers, Roman Numerals, Division, Converting Fractions to Decimals or Percentages and Simplifying Fractions.

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Monty's Maths Memory ?
Addition and Subtraction Dominoes
Answer addition and subtraction questions to arrange the dominoes in the correct order as quickly as possible. Lots of choice over level including; add and/or subtract within 20, 50, 100, using decimals or with negative numbers.

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Addition and Subtraction Dominoes ?
Maths Fishing - Subtraction
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Maths Fishing - Subtraction ?
Maths Fishing - Addition
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Maths Fishing - Addition ?
Missing Digits - Column Subtraction
Find the missing digit in the column subtraction. Think about whether exchanging is needed.

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Missing Digits - Column Subtraction ?
Column Addition
The next step towards an efficient formal method of column addition. Add the numbers starting with the least significant, then combine the partitioned result. Choice of 2-digit, 3-digit or 4-digit.

For more addition and subtraction resources click here.

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Column Addition ?
Balance scales - add, move or remove a weight
Balance the scales by adding, moving or removing a weight. A great mental starter to develop addition and subtraction skills.

For more addition and subtraction resources click here.

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Balance scales - add, move or remove a weight ?
Difference using a marked number line
Count on from the smaller number to the larger. As numbers are added to the balance scale they are also shown on the number line. Children should be encouraged to use their knowledge of number bonds to develop efficient mental methods.

Levels include counting up to 10, 20, 50 or 100, finding the difference between 2-digit numbers and decimals.

For more addition and subtraction resources click here.

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Difference using a marked number line ?
Angry Andy Must Have Candy
Answer the maths questions and then collect as much candy as you can for Angry Andy.

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Angry Andy Must Have Candy ?
Match the Wall - Maths Game
Move the block to match the wall. The quicker and more accurately you answer the maths questions, the slower the wall will travel.

Hundreds of maths skills to practise.

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Match the Wall - Maths Game ?
Caterpillar Carnage
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Caterpillar Carnage ?
Expanded Addition
Add the partitioned numbers beginning with the largest. Choice of 2-digit, 3-digit or 4-digit numbers. An important conceptual step before a more formal method of column addition.

For more addition and subtraction resources click here.

This game is now part of the 'Calculations' collection, which includes the following 17 games and resources: Column Addition, Expanded Addition, Expanded Addition - Place Value Counters, Number Bonds(2), Addition - Digit Drag, Missing Symbols, Column Subtraction, Column Subtraction using Place Value Counters, Counting on to find difference on a beadstring, Multiplication Grid Method, Multiplication Written Method, Ratio and Scaling Numbers, Representing Multiplication, Division by Chunking Up, Division by Chunking Down, Formal Written Division - Round Up or Down?, Short Division Writen Formal Method.

The Calculations app is available on Google Play and the App Store.

Game availability:

Online in HTML5 format
Expanded Addition ?
Monkey Maths
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Monkey Maths ?
Missing Symbols
Drag the symbols to the correct position to make the number sentence correct. Lots of levels to play. See if you can improve your score over time.

For more multiplication and division resources click here.

For more addition and subtraction resources click here.

This game is now part of the 'Calculations' collection, which includes the following 17 games and resources: Column Addition, Expanded Addition, Expanded Addition - Place Value Counters, Number Bonds(2), Addition - Digit Drag, Missing Symbols, Column Subtraction, Column Subtraction using Place Value Counters, Counting on to find difference on a beadstring, Multiplication Grid Method, Multiplication Written Method, Ratio and Scaling Numbers, Representing Multiplication, Division by Chunking Up, Division by Chunking Down, Formal Written Division - Round Up or Down?, Short Division Writen Formal Method.

The Calculations app is available on Google Play and the App Store.

Game availability:

Online in HTML5 format
Missing Symbols ?
Counting on to find a difference - beadstrings
I designed this activity to help children to visualise small differences between 2-digit numbers by bridging through multiples of 10. It can also be used to explore links between addition and subtraction and to begin to find differences using a number line.

This game is now part of the 'Calculations' collection, which includes the following 17 games and resources: Column Addition, Expanded Addition, Expanded Addition - Place Value Counters, Number Bonds(2), Addition - Digit Drag, Missing Symbols, Column Subtraction, Column Subtraction using Place Value Counters, Counting on to find difference on a beadstring, Multiplication Grid Method, Multiplication Written Method, Ratio and Scaling Numbers, Representing Multiplication, Division by Chunking Up, Division by Chunking Down, Formal Written Division - Round Up or Down?, Short Division Writen Formal Method.

The Calculations app is available on Google Play (£1.25) and will be available in the App Store in July.

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Online in HTML5 format
Counting on to find a difference - beadstrings ?
Using a Calculator - Finding Change
Answer a variety of 2 step word problems using a calculator. Whatever is input into the calculator is then recorded and displayed, so children can see all the steps that have been taken. This makes it a great tool for demonstrating calculator skills on a whiteboard. It can also be really useful for children to practice independently, as they can trace and correct any mistakes they make.

For more calculator resources click here.

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Using a Calculator - Finding Change ?
Sequences - Tablet Version
Updated November 2017. This version will work on any device.

Find the correct number in a sequence. Lots of choice over level, count forwards or back, count in whole numbers, multiples of 10, multiples of 100, decimals and fractions.

For more addition and subtraction resources click here.

For more resources involving fractions and decimals click here.

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Online in HTML5 format
Sequences - Tablet Version ?
Tower of Mathematics - Subtraction
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Tower of Mathematics - Subtraction ?
Reading Scales - Capacity Word Problems
Read the scales on the measuring cylinder and answer word problems involving addition and subtraction. Play against the clock for points.

For more measuring resources click here.

For more resources involving word problems click here.

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Reading Scales - Capacity Word Problems ?
Maths Penalty Shoot-out
Answer the questions quickly and accurately to get more penalties.

Hundreds of maths skills to choose from with levels involving multiplication, division, addition, subtraction, reading numbers, rounding numbers, reading Roman Numerals, fractions of numbers, simplifying fractions and converting between fractions, decimals and percentages.

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Maths Penalty Shoot-out ?
Addition - Guard the Garden
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Addition - Guard the Garden ?
Subtraction - Mini Maths Golf
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Subtraction - Mini Maths Golf ?
Basketball Maths
Answer the maths questions quickly and accurately to earn basketballs and then see how many points you can score.

Hundreds of maths skills to choose from with levels involving multiplication, division, addition, subtraction, reading numbers, rounding numbers, reading Roman Numerals, fractions of numbers, simplifying fractions and converting between fractions, decimals and percentages.

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Online in HTML5 format
Basketball Maths ?
Maths Colour Match
Answer the maths questions then launch the spaceships at their matching colour.

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Maths Colour Match ?
Maths Tower Construction
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Maths Tower Construction ?
Maths Fairground Shoot
Use your maths skills to earn time in the game and see how many ducks you can shoot.

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Maths Fairground Shoot ?
Maths Climber
Answer the maths questions and then drive your car as quickly (and safely) as you can. Be careful - drive too fast and you might flip it over.

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Maths Climber ?
UFO Maths
Shoot the UFO with the correct answer and dodge the incoming fire. A fun game to practise a wide range of key mathematical skills.

There are over a hundred carefully differentiated levels linked to objectives from the new maths curriculum. The game can be used to teach: Multiplication, Addition, Reading Numbers, Subtraction, Fractions of Numbers, Roman Numerals, Rounding Numbers, Division, Converting Fractions to Decimals, Converting Fractions to Percentages, Telling the Time in Words, Recognising Multiples, Factors, Prime, Square and Cube Numbers, and Simplifying Fractions. A full list of levels is below.

Game availability:

Online in HTML5 format
UFO Maths ?
Number Bonds (2)
Designed to help children to visualise and understand number bonds to 20, 50 and 100. Numbers are represented on a number line and using base-ten blocks.

For more addition and subtraction resources click here.

This game is now part of the 'Calculations' collection, which includes the following 17 games and resources: Column Addition, Expanded Addition, Expanded Addition - Place Value Counters, Number Bonds(2), Addition - Digit Drag, Missing Symbols, Column Subtraction, Column Subtraction using Place Value Counters, Counting on to find difference on a beadstring, Multiplication Grid Method, Multiplication Written Method, Ratio and Scaling Numbers, Representing Multiplication, Division by Chunking Up, Division by Chunking Down, Formal Written Division - Round Up or Down?, Short Division Writen Formal Method.

The Calculations app is available on Google Play and the App Store.

Game availability:

Online in HTML5 format
Number Bonds (2) ?
Maths Choppity Chop
Answer the maths questions and then chop the vegetables. Avoid the steel bar and the saw.

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Maths Choppity Chop ?
Crossroads Chaos
Tap on a car to speed it up and avoid crashing.

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Crossroads Chaos ?
Order of Operations
Use knowledge of the order of operations to carry out calculations involving the four operations and explore the order of operations using brackets. For each question you must drag the symbols <, >, or = to compare the two calculations.

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Online in HTML5 format
Order of Operations ?
Add and Subtract on a Number Line
Add and subtract near multiples on a number line. Develop mental methods of addition and subtraction by adding and subtracting a multiple of 10 or 100, and then adjusting. For example add 29 by adding 30 and then subtracting 1.

For more addition and subtraction resources click here.

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Add and Subtract on a Number Line ?
Run Pineapple Run
Answer the maths questions and then run to avoid the chompers.

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Run Pineapple Run ?
How much more money?
Find the total of a set of coins and then work out how much more is needed to make a given amount. A number line is then shown to help support calculation strategies.

Includes the option of a range of international coins.

For more money resources click here.

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Online in HTML5 format
How much more money? ?
Y6 Arithmetic Practice
This activity provides practice of the types of questions that appear in the Y6 Arithmetic test.

All questions are based on those that have appeared in the Year 6 Arithmetic tests from 2016-2018. We have not included questions that require a written method of calculation. There are hundreds of potential questions. Ideal for assessing gaps and progress.

Results can be saved and printed at the end of the test.

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Y6 Arithmetic Practice ?
Tower Block - Balloon Blast
Blast the balloons and avoid the explosives.

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Tower Block - Balloon Blast ?
Marlon's Magical Maths Mission - Subtraction
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Marlon's Magical Maths Mission - Subtraction ?
Missing Digits - Column Addition
Find the missing digit in the column addition sums. Think carefully about carrying.

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Missing Digits - Column Addition ?
Jetpack Mathematics - Subtraction
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Jetpack Mathematics - Subtraction ?
Adding Several Numbers
Add several numbers to make a target number. Lots of choice of levels including whole numbers and decimals.

For more addition and subtraction resources click here.

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Adding Several Numbers ?
Number Bonds
Find pairs of numbers with a given total. Play against the clock.

For more addition and subtraction resources click here.

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Number Bonds ?
Maths Squirrel Jump
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Maths Squirrel Jump ?
Different Ways to Pay
Find different ways to make the same amount of money. Drag the coins into the till to make a given amount. Includes a choice of international currencies.

For more money resources click here.

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Different Ways to Pay ?
Balancing Scales g and kg
Add weights to either pan until they are balanced. Can be used to teach addition, subtraction, partitioning, and mass, as well as developing an understanding of the equals sign.

Choose from grams, whole kilograms or kilograms with either 1 or 2 decimal places.

For more addition and subtraction resources click here.

For more partitioning resources click here.

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Balancing Scales g and kg ?
Addition - Digit Drag
Drag the digits to make a given sum. Lots of choice over level. A great starter activity for discussions on place value, mental methods of calculations and problem solving.

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Addition - Digit Drag ?
Animal Sorting - Maths Game
Answer the maths questions then sort the animals as quickly as you can.

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Animal Sorting - Maths Game ?
Solve 2 Step Money Problems
Read and interpret 2 step word problems using a variety of contexts. This version will work on any device.

For more money resources click here.

For more resources involving word problems click here.

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Solve 2 Step Money Problems ?
100 Square
An incredibly versatlie teaching tool. Can be used to explore number patterns, multiples, prime numbers and lots more.

For more addition and subtraction resources click here.

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100 Square ?
Finding differences between times
Find how long a journey took by jumping on a timeline.

For more measuring and time resources click here.

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Finding differences between times ?
Solve 1 Step Money Problems
Read and interpret a word problem involving addition or subtraction and then solve.

For more money resources click here.

For more resources involving word problems click here.

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Solve 1 Step Money Problems ?
Temperature - Word Problems
Answer questions about the temperature around the world. Includes levels involving comparing temperatures, and comparing poistive and negative temperatures.

For more resources involving word problems click here.

For more measuring and time resources click here.

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Temperature - Word Problems ?
ITP Number Facts
This ITP has been remade so that it will work in modern browsers. It will remain free to use.

This ITP displays up to 20 coloured counters and the corresponding addition sentence. The number of counters you select, appear on the screen in purple. Click on any counter to change its colour, the number sentence also changes. To hide and reveal the number sentence, click on the box with the question marks. You can replace a number in the number sentence with a question mark by clicking on the number, and drag counters around the screen to form groups. Addition can be changed to subtraction by clicking on the addition sign in the box. Counters can be dragged into the displayed box, which you can make opaque to hide the counters.
The ITP can be used to model addition by combining and counting, and subtraction by partitioning and taking away. The hide and reveal options allow you to pose questions with unknown numbers in different positions in the number sentence. Partitioning counters in different ways helps children to identify all sums and differences of numbers to 20.

For more addition and subtraction resources click here.

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Online in HTML5 format
ITP Number Facts ?
ITP Difference
I am remaking the ITPs so that they will work on all modern browsers and tablets. They will remain freely available to all without the need for a subscription. This ITP allows you to compare two rows of beads and to analyse the calculations they can represent. It can be used to promote the language of addition and subtraction, particularly the interpretation of difference. The ITP operates as a series of animations which show how the rows of beads can be represented by two number lines and then as a single number line with the difference indicated by a ‘jump’.

For more addition and subtraction resources click here.

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Online in HTML5 format
ITP Difference ?
ITP Beadstring
I am remaking the ITPs so that they will work on all modern browsers and tablets. They will remain freely available to all without the need for a subscription.

This ITP simulates a 100-bead string. You can move all the beads to the right of the string and move individual or groups of beads to the left side of the string by clicking on selected beads. The controls also allow you to move 1 or 10 beads to the left or right of the string to show addition and subtraction. This ITP can be used to model different counting and calculation strategies.

For more addition and subtraction resources click here.

Game availability:

Online in HTML5 format
ITP Beadstring ?
ITP Number Grid
This ITP has been remade so that it will work in modern browsers. It will remain free to use.

This ITP generates a 100 square. Choose a colour or the grey mask. You can then click on individual cells to hide or highlight them in different colours, and by clicking on the box at the left-hand foot of the grid and using the pointers you can hide or highlight rows and columns. The prime numbers and multiples can also be highlighted.
You can change the number of columns from 3 up to 13, the starting number, and its position – either top left corner or bottom left corner of the grid. Choose the mask option to create a temple that can be moved around the grid to hide or highlight particular groups of cells. The template can be rotated using the single arrow button.
The ITP can be used to explore different multiples, number sequences and patterns on grids of different sizes. The superimposed masked template can provide practice at adding groups of numbers and enable children to hypotheses about the sums and difference of the numbers.
The ITP can develop children’s ability to predict and generalise. Changing the number of columns provides a new grid to test general statements about the relationships between numbers and to look for counter examples.

For more addition and subtraction resources click here.

Game availability:

Online in HTML5 format
ITP Number Grid ?
ITP Function Machine
One or two-step function machine. Choose an input and explore how it is transformed by one or two number functions.

Game availability:

Online in HTML5 format
ITP Function Machine ?
ITP Number Line
I am remaking the ITPs so that they will work on all modern browsers and tablets. They will remain freely available to all without the need for a subscription.

This ITP generates a number line. Two markers with numbered boxes can be moved along the number line. Depending on the order of the two markers you can show the sum and difference between the two numbers and the calculation represented. You can hide and reveal the numbers in the boxes, which will also hide and reveal the respective numbers in the calculation. The maximum and minimum values on the number lines can be altered and the numbered intervals can be hidden and revealed.

The ITP can be used to model calculation strategies for addition and subtraction and to develop children’s understanding of the sums and differences between positive and negative numbers. Selecting different scales on the number line and hiding and revealing the numbered intervals can support children’s estimation skills and ability to read horizontal scales.

Game availability:

Online in HTML5 format
ITP Number Line ?