Subtraction is taking of one number or amount away from another.
It is opposite of addition.
Example
Look at this subtraction.
10 - 1 = ?
Answer
Start at 10 and count 1 backwards.
You can use the number line to help you count.
10 - 1 = 9
In this worksheet, students practise subtracting the number 1.
Key stage: KS 1
Curriculum topic: Number: Addition and Subtraction
Curriculum subtopic: Add and Subtract to 20
Difficulty level: 
