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Addition of Decimals

Erica bought ...

Question

Erica bought 3 1/2 yards of fabric. If she uses 2/3
of the fabric to make a curtain, how much will she have left?

1/6 yd.

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1/3 yd.

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1 1/6 yd.

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2 1/3 yd.

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Solution

The correct option is D 1 1/6 yd.
Erica bought $3 \frac{1}{2} = \frac{7}{2}$ yards
The fabric she used is $2 / 3 \times 7 / 2 = 7 / 3$
The fabric she left is $7 / 2 - 7 / 3 = 7 / 6 = 1 \frac{1}{6}$

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