Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 3 - Adding and Subtracting Fractions - Review Exercises: 44

Answer

$Estimate: 54$ tons $Exact: \displaystyle 53\frac{5}{12}$ tons

Work Step by Step

We need to find the sum of the newspaper weights: $\displaystyle 28\frac{2}{3}+24\frac{3}{4}$ First, we estimate by rounding: $\displaystyle 28\frac{2}{3}+24\frac{3}{4}$ $\approx 29+25$ $\approx 54$ tons Next, we get the exact answer: $\displaystyle 28\frac{8}{12}+24\frac{9}{12}$ $=\displaystyle 52\frac{17}{12}$ $=\displaystyle 53\frac{5}{12}$ tons The exact result is fairly close to the estimate.
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