The minuend is the number being subtracted from.

A subtrahend is a number subtracted from another.

Bridge means subtracting to make 10 and then subtracting whatever is left.

Partition means splitting a number into smaller parts.

Subtracting numbers that bridge through 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

 Izzy is trying to find the answer to 13 − 6. What is the best way of partitioning 6 to bridge 10? 

Alex has 11 cherries. He eats 7 of them. How many are left? 

Izzy uses a number line to find the answer to an equation. What has Izzy subtracted altogether? 

Match the equations to the correct differences. 

Which equations have a difference of 10? 

There are 18 slices of pizza. Alex eats some slices. There are 10 slices left. How many slices did Alex eat? 

Match each equation with the correct difference. 

What could the missing subtrahends be? Tick all the possible answers. 

This lesson will soon be taken down.

Subtracting numbers that bridge through 10

Lesson outcome