Now we are going to look at how we can compare the size of numbers using multiplication and how we can use division to work out how many times smaller one group is compared to another.

Let's start by watching this video.

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Question 1

$James$ has $5$5 $comic books$ . $Mae$ has $2$2 times as many $comic books$ as $James$ .

How many $comic books$ does $Mae$ have?

Question 2

If $Carl$ is $49$49 years old and his son is $7$7 times younger than him, how old is $Carl$ 's son?

Remember!

Phrases such as "How many times bigger..." or "Make this number __ times bigger," mean we can use multiplication.
To work out how many times smaller one group is compared to another, divide the larger group by the smaller group.

Outcomes

4.OA.A.2

Multiply or divide to solve word problems involving multiplicative comparison, e.g. By using drawings and equations with a symbol for the unknown number to represent the problem, distinguishing multiplicative comparison from additive comparison

3.05 Story problems with multiplication and division

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Question 1

Question 2

Outcomes

4.OA.A.2

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