Lesson

Remembering how to find the missing number in a number sentence can help us solve problems in this lesson. Let's give this problem a try.

Complete the statement with the missing number: 8\times⬚=80

Worked Solution

Idea summary

We can rewrite multiplication statements as division statements to find unknown values.

This video shows how to balance number sentences where there are different operators on either side of the equality symbol.

Complete the number sentence: 48 - ⬚ = 19 +16

Worked Solution

Idea summary

Whenever there is an equal sign we need to make sure that the value of the expressions on each side are the same.

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

uses mental and informal written strategies for multiplication and division