Lesson

We have learned to write a number problem from a story problem with multiplication or division already.

There are 3 rows of trees in a field, with 10 trees in each row.

a

Write a number sentence for this story problem.

Worked Solution

b

How many trees are there in the field?

Worked Solution

Idea summary

If we have a number of equally sized groups, we need to multiply to work out the total.

What happens if our story has more than one part to it? Let's see how to turn that into a number problem with multiplication and division.

There are 2 flower beds in Irene's backyard. Each flower bed has 4 strawberry plants.

a

How many strawberry plants are there in total?

Worked Solution

b

If each plant has 3 strawberries growing on it, how many strawberries are there in total?

Worked Solution

Idea summary

We can use pictures, numbers or symbols for our problems, so it helps to know how to use each method.

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