Mary purchased 3 yards of fabric from a roll containing 8 1/2 yards. How many 1/2 yards of fabric remain on the roll?
We are given that Mary purchased 3 yards of fabric from a roll that started with 8 1/2 yards, and we are asked to find the number of 1/2 yards remaining on the roll.
There are a couple of good approaches for a problem like this. One idea is to convert every measurement to half-yards. We choose half-yards because the answer is to be given in terms of half-yards.
Thus, Mary's purchase of 3 yards becomes a...
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