Lesson

Sometimes, we need to know how to write a number sentence from a story problem .

There were 2 rows of trees in a field, with 3 trees in each row.

Write a number sentence for this story problem to find the total number of trees in the field.

Worked Solution

Idea summary

If we need to find the total for multiple equal groups, we need to multiply.

How do we know if we need to multiply or divide, when we have a story problem? Let's see if we can find some clues, in this video.

A teacher wants to divide up her class of 6 students evenly onto 3 tables.

a

Write a number sentence for this story problem.

Worked Solution

b

How many students will there be at each table?

Worked Solution

Idea summary

If we

**have a total to share**, we use**division**to work out how many groups, or how many in each group.If we

**have a number of equally sized groups**, we need to**multiply**to work out the total.Multiplication and division are opposites but you can use fact families to help you to solve questions.

uses mental and informal written strategies for multiplication and division

generalises properties of odd and even numbers, generates number patterns, and completes simple number sentences by calculating missing values