# Practise Adding and Subtracting Ten (0 - 100)

In this worksheet, students will work out what comes out of or goes into a Subtract Ten Machine.

Key stage:  KS 1

Curriculum topic:   Number: Addition and Subtraction

Curriculum subtopic:   Solve Add/Subtract Problems to 20

Difficulty level:

#### Worksheet Overview

In this activity, you need to work out what goes in or what comes out of a Subtract Ten Machine.

16 - 10 = 6, so when 16 goes in, 6 comes out.

Also 6 + 10 = 16, so when 6 comes out, 16 must have gone in.

Let's try another one:

If I put 13 into the machine, what number will come out?

13 - 10 = 3, so the number 3 will come out!

How about if the number 4 comes out of the machine. What number must have gone in?

4 + 10 = 14, so the number 14 must have gone in.

Does this make sense? Shall we move on to try some questions?

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