Question: Audrey was asleep for 10 hours last night and dreamed for 2/5 of the time. How much of the night was she not dreaming? Think carefully first, then make a decision:
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If Audrey was asleep for 10 hours last night and dreamed for 2 / 5 of the time, she dreamed for 2 / 5 * 10 = 4 hours. The total time Audrey slept without dreaming is 10 - 4 = 6 hours. So the answer is 6.
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