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.

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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 contextual problems involving multiplicative comparison, and distinguish multiplicative comparison from additive comparison. For example, school A has 300 students and school B has 600 students: to say that school B has two times as many students is an example of multiplicative comparison; to say that school B has 300 more students is an example of 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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