5th Grade Math Quiz
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NUMBER AND OPERATIONS—FRACTIONS
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A class has 1 whole hour for a science lab. They spent 25\frac{2}{5} hour setting up and 12\frac{1}{2} hour doing the experiment. Both fractions refer to the same 1-hour whole. The teacher rewrote them as equivalent fractions: 25=410\frac{2}{5}=\frac{4}{10} and 12=510\frac{1}{2}=\frac{5}{10}. How much time did they spend in all?
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