A box with 2/3 cup of cornmeal was used to make pizza. Shelly used 1/4 of the box of cornmeal. Use a rectangle to draw a model to match your expression. What fraction of a cup of cornmeal did she use for the pizza?
1/4 * 2/3 = 1/6
divide rectangle in 12 boxes
entire rectangle is a cup
block off 1/3 which is 4 of the 12 boxes
the remaining 8 of the 12 contains 2/3 cup
use 1/4 of the 8 remaining
which is 2 of the original 12
which means using 2/12 = 1/6
To draw a model representing the situation, we can use a rectangle to represent the box of cornmeal. The length of the rectangle can be considered as the total amount of cornmeal in the box, which is 2/3 cup.
Now, we need to find the fraction of a cup of cornmeal Shelly used for the pizza. According to the information given, Shelly used 1/4 of the box of cornmeal.
To represent this on the model, we divide the rectangle into 4 equal parts horizontally. Each part represents 1/4 of the box.
Since Shelly used 1/4 of the box, we shade one of the four equal parts to represent the amount she used.
_________
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|_________|
In the model, the shaded portion represents the amount of cornmeal Shelly used, and since we divided the box into 4 equal parts, this shaded part is 1/4 of the box.
Therefore, Shelly used 1/4 of a cup of cornmeal for the pizza.