Addition and subtraction

There are 355 NRICH Mathematical resources connected to Addition and subtraction
Sea Level
problem
Favourite

Sea level

Age
7 to 11
Challenge level
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The picture shows a lighthouse and some underwater creatures. Can you work out the distances between some of the different creatures?

Magic Vs
problem
Favourite

Magic vs

Age
7 to 11
Challenge level
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Can you put the numbers 1-5 in the V shape so that both 'arms' have the same total?

I'm Eight
problem
Favourite

I'm eight

Age
5 to 11
Challenge level
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Find a great variety of ways of asking questions which make 8.
Five Coins
problem
Favourite

Five coins

Age
5 to 11
Challenge level
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Ben has five coins in his pocket. How much money might he have?
What's in a Name?
problem
Favourite

What's in a name?

Age
5 to 7
Challenge level
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What do you notice about these squares of numbers? What is the same? What is different?
Cuisenaire Counting
problem
Favourite

Cuisenaire counting

Age
5 to 7
Challenge level
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Here are some rods that are different colours. How could I make a yellow rod using white and red rods?
Making Longer, Making Shorter
problem
Favourite

Making longer, making shorter

Age
5 to 7
Challenge level
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Ahmed is making rods using different numbers of cubes. Which rod is twice the length of his first rod?

Sitting round the party tables
problem
Favourite

Sitting round the party tables

Age
5 to 11
Challenge level
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Sweets are given out to party-goers in a particular way. Investigate the total number of sweets received by people sitting in different positions.
Carrying Cards
problem
Favourite

Carrying cards

Age
7 to 11
Challenge level
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These sixteen children are standing in four lines of four, one behind the other. They are each holding a card with a number on it. Can you work out the missing numbers?
Strike it out
problem
Favourite

Strike it out

Age
5 to 11
Challenge level
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Use your addition and subtraction skills, combined with some strategic thinking, to beat your partner at this game.