Basic College Mathematics (9th Edition)

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

Chapter 4 - Decimals - 4.4 Multiplying Decimal Numbers - 4.4 Exercises: 58

Answer

$(59.6)(0.1) = 5.96$ $(3.2)(0.1) = 0.32$ $(0.476)(0.1) = 0.0476$ $(80.35)(0.1) = 8.035$ $(65)(0.1) = 6.5$ $(523)(0.1) = 52.3$ The rule for multiplying by 0.1 is to move the decimal one position to the left. The rule for multiplying by 0.01 is to move the decimal two positions to the left. $(59.6)(0.01) = 0.596$ $(3.2)(0.01) = 0.032$ $(0.476)(0.01) = 0.00476$ $(80.35)(0.01) = 0.8035$ $(65)(0.01) = 0.65$ $(523)(0.01) = 5.23$ The rule for multiplying by 0.001 is to move the decimal three positions to the left. $(59.6)(0.001) = 0.0596$ $(3.2)(0.001) = 0.0032$ $(0.476)(0.001) = 0.000476$ $(80.35)(0.001) = 0.08035$ $(65)(0.001) = 0.065$ $(523)(0.001) = 0.523$

Work Step by Step

$52\underleftarrow{3}\times0.1 = 52.3$ $5\,\underleftarrow{23}\times0.01 = 5.23$ $\underleftarrow{523}\times0.001 = 0.523$
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