Who Wants Pizza? - Part 5

 The last time that Ms. Martinez ordered pizza, there was 2/3 of a pizza left. Bobby came in and ate 1/2 of what was left. The other children were mad that Bobby ate 1/2 of it. Bobby said, "I only ate 2 pieces." Was he right? If there were12 pieces in a whole pizza, how many pieces did he eat? What fraction of a whole pizza did he eat?

 Let's Explore

Here are the 12 original pieces of the pizza.

The children left 2/3 of it.

 121 x 23 = 8

Bobby ate 1/2 of the 8 pieces left.

 81 x 12 = 4

So Bobby ate 4 pieces of pizza.

On the next page we will investigate the fraction of the pizza that Bobby ate.

 Something for You to Do

Directions:Use colored markers and the square grid paper to draw the fractions as we have above and multiply the following.

 1 1/4 x 2/3 of 12 pieces

(a. 2) (b. 1) (c. 12) (d. 8) (e. 4)

 2 4/5 x 1/4 of 20 pieces

(a. 2) (b. 1) (c. 12) (d. 8) (e. 4)

 3 2/3 x 3/4 of 24 pieces

(a. 2) (b. 1) (c. 12) (d. 8) (e. 4)

 4 4/5 x 1/2 of 20 pieces

(a. 2) (b. 1) (c. 12) (d. 8) (e. 4)

 5 1/2 x 1/2 of 4 pieces

(a. 2) (b. 1) (c. 12) (d. 8) (e. 4)