Comprehensive & curriculum aligned

In this worksheet, students will work out the missing numbers in the addition grids.

Key stage:  KS 1

Curriculum topic:   Number: Number and Place Value

Curriculum subtopic:   Represent Numbers to 100

Difficulty level:

Worksheet Overview

In this activity, we will be finding the missing numbers in addition grids.

Look at this grid.

 + 1 2 3 4 5 1 2 6 3 4 6 5

It shows that 2 + 4 = 6 and 4 + 2 = 6

Now look at this grid.

 + 1 2 3 4 5 1 2 3 6 3 4 6 5 9

It now also shows that 2 + 1 = 3 and 5 + 4 = 9

Example

Complete the grid below to find the value of A.

 + 1 2 3 4 5 1 2 A 4 5 6 2 A 4 5 6 7 3 4 5 6 7 8 4 5 6 7 8 9 5 6 7 8 9 10

2 + 1 = 3 and 1 + 2 = 3

A is 3

 + 1 2 3 4 5 1 2 3 4 5 6 2 3 4 5 6 7 3 4 5 6 7 8 4 5 6 7 8 9 5 6 7 8 9 10

Let's try some questions on this now.

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