Basic College Mathematics (9th Edition)

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

Chapter 1 - Whole Numbers - 1.2 Adding Whole Numbers - 1.2 Exercises: 85

Answer

$72$ feet (ft.) of lumber

Work Step by Step

To find the amount of lumber we will find the distance around the entire patio, we will add the three sides (18, 30, 24) $18 + 30 + 24$ Start at the right of each number and add the ones digits $8 + 0 + 4 = 12$ ones Regroup the $12$ ones as $1$ ten and $2$ ones Write the $2$ ones in the ones column. Write the $1$ ten in the tens column Add the tens column next including the regrouped $1$ $1 + 1 + 3 + 2 = 7$ tens Write the $7$ tens in the tens column. The sum of the three numbers is $72$ The distance is $72$ feet (ft).
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