A number bond is a pair of numbers that add up to a target, like 7 + 3 = 10. Choose bonds to 10, 20 or 100 and find the missing number in each question.
Knowing number bonds by heart makes addition, subtraction and later times tables much easier, because children can split and combine numbers quickly in their heads.
How to use it
- Choose bonds to 10, 20 or 100.
- Look at the sum and find the missing number.
- Tap your answer. Ten questions make one round.
Skills practised
For Grades 1–3.
- Number bonds to 10, 20 and 100
- Addition and subtraction facts
- Mental strategies like making ten
Frequently asked questions
What is a number bond?
A number bond is a pair of numbers that add up to a total, such as 6 and 4, which make 10.
Why are number bonds important?
They let children add and subtract quickly in their heads, which makes column methods, money and times tables much easier later.