  # Use the Inverse Operation to Find the Answer

In this worksheet, students will find the missing number in a calculation using subtraction. Key stage:  KS 2

Curriculum topic:   Number: Addition and Subtraction

Curriculum subtopic:   Use Correct Methods to Problem Solve

Difficulty level:   #### Worksheet Overview

In this activity, we will be finding the missing number in a calculation.

Example

Find the number that makes the calculation correct.

332 + __ = 900

The opposite (inverse) of adding is subtracting.

So we work out 900 - 332 = 568

Here is a simpler example:

400 + ___ = 600

The inverse operation is:

600 - 400 = 200

Does that make sense? Let's practise this skill in the following questions.

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