Prealgebra (7th Edition)

Published by Pearson
ISBN 10: 0321955048
ISBN 13: 978-0-32195-504-3

Chapter 5 - Section 5.3 - Multiplying Decimals and Circumference of a Circle - Exercise Set: 9

Answer

28.56

Work Step by Step

Since the first factor has 1 decimal place and the second has 1 decimal place, the product has 2 decimal places. $\ \ \ \ \ 6.8$ $\underline{\times\ \ 4.2}$ $\ \ \ \,1.36$ $\underline{\ \ 27.20}$ $\ \ 28.56$ Estimate: $6.8\approx7$ $4.2\approx4$ $7\times4=28\checkmark$
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