Prealgebra (7th Edition)

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

Chapter 1 - Review - Page 89: 17



Work Step by Step

Working left to right, add the corresponding digits in each place value. $\ \ \ 428$ $\ \ \underline{+21}$ Add the ones position $8+1=9$ Add the tens position $2+2=4$ Add the hundreds position $4+0=4$ Write the result of each addition step in its proper position for its place value.
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