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Work Out the Missing Number in a Variety of Calculations

In this worksheet, students will work out the missing number in a variety of calculations.

'Work Out the Missing Number in a Variety of Calculations' worksheet

Key stage:  KS 3

Year:  Year 7 Maths worksheets

Curriculum topic:   Number

Curriculum subtopic:   Use Relationships Between Operations

Difficulty level:  

Worksheet Overview

In this activity, we will work out missing numbers in calculations.


Example 1

Find the missing number.


26 + ? = 50


Here, it is easy to work out the inverse.

50 - 26 = 24



Example 2

Find the missing number.


-26 + ? = 50


Here, we use the inverse again, but be careful about the negative sign.  

Two negatives next to each other means a positive.


50 - -26 = 50 + 26 = 76


In this activity, we will be using inverse operations to find the missing numbers.


question mark

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