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Addition and Subtraction: Find the Missing Number (3)

In this worksheet, students solve number problems using addition to find the missing value (0-20).

'Addition and Subtraction: Find the Missing Number (3)' worksheet

Key stage:  KS 1

Curriculum topic:   Number: Addition and Subtraction

Curriculum subtopic:   Solve Add/Subtract Problems to 20

Difficulty level:  

Worksheet Overview

Addition is adding something on.

When you add things together, you get a total.




Look at this problem. A number is missing.

You need to find its value. You can use addition.


6 + ? = 17



You add a number to 6 to make 17? (17 is your total.)

17 - 6 = 11

So the missing number = 11



6 + 11 = 17

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