Concept explainers
Laundry day (ExH). Suppose you are given a bag of quarters. The laundry machine requires $1.75 worth of quarters. One way to count how many washes you can do is to take out one quarter and say
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The Heart of Mathematics: An Invitation to Effective Thinking, WileyPLUS NextGen Card with Loose-leaf Set Single Semester: An Invitation to Effective Thinking (Key Curriculum Press)
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