Basic College Mathematics (9th Edition)

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

Chapter 2 - Multiplying and Dividing Fractions - Test: 21


estimated = 16 exact = 14$\frac{7}{16}$

Work Step by Step

4$\frac{1}{8}$ * 3$\frac{1}{2}$ Estimate the answer by rounding the mixed numbers 4$\frac{1}{8}$ round to 4 and 3$\frac{1}{2}$ round to 4 4 * 4 = 16 To find the exact answer, change each mixed number to an improper fraction. 4$\frac{1}{8}$ = $\frac{33}{8}$ 3$\frac{1}{2}$ = $\frac{7}{2}$ Now multiply, $\frac{33}{8}$ * $\frac{7}{2}$ = $\frac{231}{16}$ = 14$\frac{7}{16}$ The exact answer is 14$\frac{7}{16}$ The exact answer is reasonable.
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