Addition and subtraction

There are 355 NRICH Mathematical resources connected to Addition and subtraction
How do you do it?
problem
Favourite

How do you do it?

Age
7 to 11
Challenge level
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This group activity will encourage you to share calculation strategies and to think about which strategy might be the most efficient.

Subtraction Surprise
problem
Favourite

Subtraction surprise

Age
7 to 14
Challenge level
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Try out some calculations. Are you surprised by the results?
Always, Sometimes or Never?
problem
Favourite

Always, sometimes or never?

Age
5 to 11
Challenge level
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Are these statements relating to odd and even numbers always true, sometimes true or never true?

Always, Sometimes or Never? KS1
problem
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Always, Sometimes or Never? KS1

Age
5 to 7
Challenge level
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Are these statements relating to calculation and properties of shapes always true, sometimes true or never true?

What Distance?
problem
Favourite

What distance?

Age
7 to 11
Challenge level
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Can you use addition and subtraction to answer these questions about real-life distances?

Build it up
problem
Favourite

Build it up

Age
7 to 11
Challenge level
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Can you find all the ways to get 15 at the top of this triangle of numbers? Many opportunities to work in different ways.
6 by 6 Mathdokus
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6 by 6 mathdokus

Age
7 to 16
Challenge level
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Can you use the clues to complete these 6 by 6 Mathematical Sudokus?
3 by 3 Mathdokus
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3 by 3 mathdokus

Age
7 to 14
Challenge level
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Can you use the clues to complete these 3 by 3 Mathematical Sudokus?
Five More Coins
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Five more coins

Age
7 to 11
Challenge level
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Could Ben have any amount of money between 5p and £2 in his pocket if he has five coins?
Mathdoku
problem

Mathdoku

Age
7 to 11
Challenge level
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Complete the Mathdoku grid using the clues. Can you convince us that the number you have chosen for each square has to be correct?