Addition is commutative. This means the order of the addends can be changed without changing the calculation or sum.

An equation is used to show that one number or calculation is equal to another.

The sum is the total when numbers are added together.

Add three addends by finding pairs that total 10

Maths

In this unit pupils will be reviewing and securing previous knowledge of add 3 addends, understanding they can be added in any order, bridging through 10. In the future unit pupils will use known facts to find multiples of ten that compose 100  and use known facts to find complements to 100.

In the prior unit pupils learned to find 10 more or less than a 2-digit number. They added and subtracted 10 to/from a 2-digit number using number facts. In this unit pupils will be reviewing and securing previous knowledge of add 3 addends, understanding they can be added in any order, bridging through 10

Review strategies for adding and subtracting across 10

What equation do the tens frames represent? 

Which calculations include number pairs that total 10? 

What is the sum of the numbers in the bar model?

Find the missing addend in the equation. 

What addend is missing from this bar model? 

Which calculation has the same sum as 3 + 4 + 5?

What is the sum of the numbers in the bar model? 

What addend is missing from the bar model?

Which number makes this equation correct? 

Which pairs of dice show a total of ten dots? 

This lesson will soon be taken down.

Add three addends by finding pairs that total 10

Lesson outcome