Chapter 7 Fractions Multiplication Test

 $2\ \frac{1}{3}\times3\ \frac{2}{7}=$  
Answer should be in simplest form.

 $\frac{2}{3}\times\frac{5}{8}=$  
Answer should be in simplest form.

 $2\ \frac{1}{4}\times5\ \frac{1}{3}=$  
Answer should be in simplest form.

A postcard has an area of 48 square inches. Two enlargements have areas of 108 square inches, and 192 square inches. In each postcard, the length is 1 1/3 times the width. Which of the following can be dimensions of the postcard or one of the enlargements? Mark all that apply.

• 6 x 8

• 4 x 12

• 4 x 27

• 9 x 12

• 12 x 16

Kelly is baking cupcakes. The recipe calls for 3 1/2 cups of flour. If she wants to make 2 1/2 times the recipe, how many cups of flour will she need?

Answer in simplest form.

Felipe ran 5 1/4 miles after school yesterday. Stephanie ran 1 1/3 times as far as Felipe. How far did Stephanie run?

 $5\ \frac{2}{3}\times6\ \frac{9}{11}=$  
Answer must be in simplest form.

Frank is using the following recipe to make brownies.

1 bag chocolate chips

3 1/2 cups of flour

1/2 teaspoon of vanilla

2/3 cups sugar

1 stick butter

3 eggs

Frank wants to make 5 times the recipe. He has 3 cups of sugar. Does he have enough? (Answer yes or no.)

Derek spent 4 1/2 hours working on his science fair project. Erica spent 3/4 as long as Derek did. How long did Erica spend on her science fair project?

In Mrs. Ling's class, 3/5 of the boys have black hair. Of the boys with black hair, 1/2 wear glasses. Of the black haired boys with glasses, 3/4 have brown eyes. What fraction of the boys in Mrs. Ling's class have black hair, brown eyes, and wear glasses?