Lesson

Let's go over some of the subtraction strategies we've looked at. These include:

jumping back, using a number line

bridging, or making up to 10

using the answer to one problem to find the answer to another problem, by compensating

We also looked at how to use a vertical algorithm , writing our total first, then the number we are subtracting below it. This strategy can also be really useful if we need to trade, or regroup .

Use the number line to help you find the value of 35 - 24.

Worked Solution

Find the value of 854 - 6.

Worked Solution

Find the value of 447 - 81.

Worked Solution

Idea summary

When we are subtracting, we can't write our numbers in any order, like we can for addition. We must write the total, then the number we are subtracting, or taking away.

uses mental and written strategies for addition and subtraction involving two-, three-, four and five-digit numbers