Question

Tina practiced piano for 15 hours last month and 45 hours this month.

Answer 1

A). 45 ÷ 15 = 3 so 15 × 3 = 45

Not sure on b but

B). 15 + 30 = 45
So the sedation would be 30

Answer 2

ANSWER

A) "The number of hours Tina practiced this month is three times, the number of hours she practiced last month."


B) "The number of hours Tina practiced this month is 30 more than the number of hours she practiced last month."


EXPLANATION

A) The number of hours Tina practiced last month is
$= 15$

The number of hours Tina practiced this month is
$= 45$

Using multiplication, we can compare the hours Tina practiced for the two months as follows.


$45 = 3 \times 15$

We can say that,
"The number of hours Tina practiced this month is three times, the number of hours she practiced last month."




B) Using addition, we again compare the hours for both month as follows.


$45 = 15 + 30$

We say that,
"The number of hours Tina practiced this month is 30 more than the number of hours she practiced last month."