Shako is in charge of getting the art supplies ready for the first grade classes. there are 3 first grade classes and each class has 22 students in it. if each student needs 2 pieces of red paper and there are 150 pieces of red paper available, how many pieces of red paper will be left?

Hi there! The answer is 18 pieces.

There are 3 first grade classes and each class has 22 students in it. Therefore there are 3 × 22 = 66 students.

If there are 66 students and each student needs 2 pieces of red paper, there is a total need of 2 × 66 = 132 pieces of red paper.

There are 150 pieces of red paper and there is a total need of 132 of these pieces. Therefore there are 150 - 132 = 18 pieces of red paper left.

The answer is 18 pieces.
~ Hope this helps you!