Lesson

Remembering how we can solve addition on a number line can help us with our other addition strategies. Let's try now.

Use the number line to help you find the value of 43 + 12.

Worked Solution

Idea summary

Number lines can help us visualise the jumps between numbers

Let's see how to change an addition problem using the bridge to ten strategy.

How many more do we need to add to 9 to get to 10?

Worked Solution

Idea summary

Bridging to 10 can help us get to 10, so that adding can be much quicker.

The next video shows us how to use the compensation strategy to add more easily.

If 7 + 10 = 17, what is the answer to 7 + 11?

Worked Solution

Idea summary

Compensation uses the answer of one problem, to find the answer to another problem.

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