Addition and subtraction

There are 338 NRICH Mathematical resources connected to Addition and subtraction
Hubble, bubble
problem

Hubble, bubble

Age
7 to 11
Challenge level
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Winifred Wytsh bought a box each of jelly babies, milk jelly bears, yellow jelly bees and jelly belly beans. In how many different ways could she make a jolly jelly feast with 32 legs?
How Old?
problem

How Old?

Age
7 to 11
Challenge level
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Cherri, Saxon, Mel and Paul are friends. They are all different ages. Can you find out the age of each friend using the information?
On Target
problem

On Target

Age
7 to 11
Challenge level
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You have 5 darts and your target score is 44. How many different ways could you score 44?
Super Value Shapes
problem

Super Value Shapes

Age
7 to 11
Challenge level
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If each of these three shapes has a value, can you find the totals of the combinations? Perhaps you can use the shapes to make the given totals?
One Big Triangle
problem

One Big Triangle

Age
5 to 7
Challenge level
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Make one big triangle so the numbers that touch on the small triangles add to 10.
X is 5 squares
problem

X is 5 squares

Age
7 to 11
Challenge level
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Can you arrange 5 different digits (from 0 - 9) in the cross in the way described?
Number Round Up
problem

Number Round Up

Age
5 to 7
Challenge level
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Arrange the numbers 1 to 6 in each set of circles below. The sum of each side of the triangle should equal the number in its centre.
Buying a Balloon
problem

Buying a Balloon

Age
7 to 11
Challenge level
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Lolla bought a balloon at the circus. She gave the clown six coins to pay for it. What could Lolla have paid for the balloon?
Starfish Spotting
problem

Starfish Spotting

Age
5 to 7
Challenge level
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How many starfish could there be on the beach, and how many children, if I can see 28 arms?
4 Dom
problem

4 Dom

Age
5 to 11
Challenge level
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Use these four dominoes to make a square that has the same number of dots on each side.