Find the Missing Number Using Addition or Subtraction

In this worksheet, students will explore the relationship between addition and subtraction to help them find the missing number.

Key stage: KS 1

Year: Year 2 Maths worksheets

Curriculum topic: Number: Addition and Subtraction

Curriculum subtopic: Understand Relationship Between Addition and Subtraction

Difficulty level:

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Worksheet Overview

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?

girl thinking

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Preview activity

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