Addition and subtraction

There are 338 NRICH Mathematical resources connected to Addition and subtraction
Big Dog, Little Dog
problem

Big Dog, Little Dog

Age
5 to 7
Challenge level
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Woof is a big dog. Yap is a little dog. Emma has 16 dog biscuits to give to the two dogs. She gave Woof 4 more biscuits than Yap. How many biscuits did each dog get?
2, 4, 6, 8
problem

2, 4, 6, 8

Age
5 to 7
Challenge level
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Using the cards 2, 4, 6, 8, +, - and =, what number statements can you make?
Calendar Patterns
problem

Calendar Patterns

Age
7 to 11
Challenge level
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In this section from a calendar, put a square box around the 1st, 2nd, 8th and 9th. Add all the pairs of numbers. What do you notice about the answers?
Christmas Shopping
problem

Christmas Shopping

Age
7 to 11
Challenge level
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Vera is shopping at a market with these coins in her purse. Which things could she give exactly the right amount for?
Up and Down
problem

Up and Down

Age
5 to 7
Challenge level
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Sam got into an elevator. He went down five floors, up six floors, down seven floors, then got out on the second floor. On what floor did he get on?
The Amazing Splitting Plant
problem

The Amazing Splitting Plant

Age
5 to 7
Challenge level
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Can you work out how many flowers there will be on the Amazing Splitting Plant after it has been growing for six weeks?
Two Dice
problem

Two Dice

Age
5 to 7
Challenge level
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Find all the numbers that can be made by adding the dots on two dice.
Domino Square
problem

Domino Square

Age
7 to 11
Challenge level
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Use the 'double-3 down' dominoes to make a square so that each side has eight dots.
Ladybird Box
problem

Ladybird Box

Age
5 to 11
Challenge level
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Place six toy ladybirds into the box so that there are two ladybirds in every column and every row.
Five Coins
problem

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?