Year 2
Maths
Number and Algebra
AC9M2N03
Number Bonds to 20
Students explore all pairs of numbers that add together to make 20.
What You Need to Know
Students explore all pairs of numbers that add together to make 20.
Key Concept Diagram
All pairs that sum to 20
Using ten-frames to find bonds
Fact families for 20
Quick recall of number bonds
Key Vocabulary
number bond
a pair of numbers that add to make a given total
fact family
a set of related addition and subtraction facts
ten-frame
a grid of ten boxes used to show numbers
complement
the amount needed to reach a target number
Knowledge Check
Select the correct answer for each question. Click "Check Answer" to see if you are right.
Question 1
Which pair is a number bond to 20?
Question 2
If 13 + ? = 20, what is the missing number?
Question 3
What is the number bond partner of 4 to make 20?
Key Concepts Summary
- ●All pairs that sum to 20
- ●Using ten-frames to find bonds
- ●Fact families for 20
- ●Quick recall of number bonds