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Two Answers are Better than One

What powerful mathematical tool do you use everyday? If you have ever considered how much food you can eat and still leave room for dessert, or made a rough calculation of how long it will take to travel to school, you are using estimates to help guide and inform your decisions.

Grade Level: High School (9-12)
Curriculum Topic Benchmarks: M1.4.8, M3.4.4, S15.4.6
Subject Keywords: Estimating, Back-of-the-envelope calculation, Significant figures, Checking your work

Author(s): Steve Frolking and Lynn Rosentrater
PUMAS ID: 04_25_99_2
Date Received: 1999-04-25
Date Revised: 1999-07-17
Date Accepted: 1999-07-17

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