Fact families - addition facts
Find out about number facts and the connection between addition and subtraction.
This lesson includes:
- a quiz
- two videos
- one interactive activity
To get started, let's see how well you know this topic already. Take the catch-up quiz below to find out.
It doesn't matter which way round you add numbers. The answer is always the same.
1 + 2 will always be the same as 2 + 1
You might find it easier to start with the bigger number and add the smaller one.
7 + 2 might be easier if you turn it round to 2 + 7.
2 + 7 = 9
7 + 2 = 9
Try it yourself. What works for you?
We know that 2 + 7 = 9. With this information we can move the numbers around again to make more number facts.
7 - 2 = 5
9 - 7 = 2
A fact family is a group of calculations that are created using the same three numbers. For example, here is a fact family that uses the numbers 2 , 4 and 6.
2 + 4 = 6
4 + 2 = 6
6 - 2 = 4
6 - 4 = 2
Play the Addition and Subtraction levels of Karate Cats Maths to test your skills on fact families and more!
There's more to learn
Have a look at these other resources.