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In this activity, we will be finding the missing number in an addition.
Example
What must I add to 24 to make 29?
24 + ? = 29
Place your finger on 29 and bounce it back, to the left, one number at a time, until you reach 25. How many bounces did you do? It was 5 bounces, so we know that 29 − 24 = 5
We could also count forwards, instead of back, if we wanted. Pop your finger on 24 and bounce it to the right, one number at a time, until you reach 29. How many bounces did you do? It was 5 again.
So, 24 + 5 = 29
There is often more than one way to solve a problem in maths. Why not try both methods and see which one works best for you?
