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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?
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Let's Explore
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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
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Directions:Use colored markers and the square grid paper to draw the fractions as we have above and multiply the following.
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1. | 1/4 x 2/3
of 12 pieces |
(a. 2)
(b. 1)
(c. 12)
(d. 8)
(e. 4)
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2. | 4/5 x 1/4 of 20 pieces |
(a. 2)
(b. 1)
(c. 12)
(d. 8)
(e. 4)
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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)