Multiplicative Comparisons

Front

What is a multiplicative comparison?

Back

A multiplicative comparison is when we compare two quantities by using multiplication, often expressed as 'times as many'.

Front

If Paul has 7 crayons and Steven has 9 times as many, how many crayons does Steven have?

Back

63 crayons (7 x 9 = 63).

Front

What does the equation 3 x 6 = 18 represent?

Back

It shows that three groups of six equal eighteen.

Front

How can you express 'four times as many' in a multiplication equation?

Back

If x is the original amount, then 'four times as many' is expressed as 4 x x.

Front

If Carl has 56 marbles and he has 7 times as many as Bill, how many marbles does Bill have?

Back

8 marbles (56 ÷ 7 = 8).

Front

What is the equation for 'three times a number is 21'?

Back

3 x x = 21.

Front

How do you find a missing number in a multiplicative comparison?

Back

You can divide the total by the multiplier to find the original amount.

Front

What does the equation 21 = 3 x 7 mean?

Back

It means that three groups of seven equal twenty-one.

Front

If a number is multiplied by 8 and the result is 32, what is the number?

Back

4 (32 ÷ 8 = 4).

Front

What is the relationship between multiplication and addition in multiplicative comparisons?

Back

Multiplication can be seen as repeated addition.