
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.
12
1 
x 
2
3 
= 
8 
Bobby ate 1/2 of the 8 pieces left.
8
1 
x 
1
2 
= 
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)
(a. 2)
(b. 1)
(c. 12)
(d. 8)
(e. 4)
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or Other Math Lessons
lanius@math.rice.edu