Basic College Mathematics (9th Edition)

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

Chapter 1 - Whole Numbers - 1.7 Rounding Whole Numbers - 1.7 Exercises - Page 74: 61

Answer

76 million rounds to 80 million; 311 million rounds to 310 million.

Work Step by Step

In 76 million, the digit right of the ten-millions place is 6, so we round up to the next biggest ten-million and change 7 to 8 to get 80 million. In 311 million, the digit right of the ten-millions place is 1, so we round down and keep the 1 the same to get 310 million.
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