Read the problem in the box and think about how you would solve it.

Each class gets 12 new bottles of paint. There are 15 classes.
How many bottles of paint are needed in all?

Which of these problems would you solve the same way?

A. Laura has 5 striped balls and 2 red balls. How many balls are there in all?

B. Mary has 3 buttons on each dress. She has 4 dresses. How many buttons does she have in all?

C. Gary had 5 model cars. He gave 2 to his friend. How many are left?

D. Kevin read 6 hours in one week. Joey read 4 hours in one week. How many more hours did Kevin read than Joey?

In this mathematics problem, 180 bottles of paint are needed in total for 15 classes, solved by multiplying 12 by 15. The question involves understanding how to find the total when given quantities per unit.

Explanation:

In the problem given, each class receives 12 new bottles of paint, and there are 15 classes. To find the total number of bottles needed, you multiply the number of bottles each class gets by the number of classes: 12 x 15 = 180 bottles of paint are needed in all.

This type of problem can be solved the same way as the problem where Laura has 5 striped balls and 2 red balls, and you need to find the total number of balls. In both cases, you are adding quantities of different items to determine the total.

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