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Numeracy problems to solve for Key Stage 1, 2 and 3

Key Stage 1     Solve it...!    
HELP! My calculator's broken!

The 7 button on your calculator is broken.

Can you find 5 ways of making the number 27 on your calculator?
Find as many different ways you can to make the number 73 on your calculator.
How would you find the total of 13 and 57 on your calculator?

An extra task
Challenge yourself to make other numbers which have a 7 digit in them.
Try making up these numbers with the 5 and 2 keys broken. 10, 25, 56, 50. Choose a different digit key which won't work. Choose some numbers for your friend to make.

Here are just two ways of making 27 on your calculator when the 7 key is broken.

20 + 5 + 2 = 27
30 - 3 = 27

Here are 2 ways of making 73 when the 7 key is broken.

50 + 23 = 73
80 - 5 - 2 = 73

The rest of the answers are variable.

Key Stage 2 & 3    Solve it...! 

Standing by the shop door were five sacks.

Sacks A and B weighed 12kg.
Sacks B and C weighed 13.5kg.
Sacks C and D weighed 11.5kg.
Sacks D and E weighed 8 kg.
Sacks A,C and E together weighed 16kg.

Can you find the weight of each sack?

A weighs 5.5kg
B weighs 6.5kg
C weighs 7kg
D weighs 4.5kg
E weighs 3.5kg


Links on this page:
Key Stage 1
Key Stage 2
Key Stage 3







These problems were sourced by North East Lincolnshire's Numeracy Team

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