Lesson

In this section you will practice the addition strategies we've looked at:

breaking up numbers and adding the parts

bridging, or making up to 10

jumping, using a number line

We also looked at how to use a vertical algorithm , writing the numbers down the page and adding them by place value. 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 43 + 12.

Worked Solution

Use a strategy to find the sum of 49 + 16

Worked Solution

Find the value of 219 + 29.

Worked Solution

Idea summary

When our numbers get bigger, adding down our page is really useful. It helps us keep our digits lined up, and makes it easier if we have to do some regrouping.

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