Basic College Mathematics (9th Edition)

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

Chapter 4 - Decimals - 4.2 Rounding Decimal Numbers - 4.2 Exercises: 40

Answer

(a) 2200 (b) 500

Work Step by Step

(a) Draw a "cut-off" line after the hundreds place: "21". Next, look at the first number after the cut-off line: "9". If the number is 5 or above, round up to the nearest hundred: "2200". (b) Draw a "cut-off" line after the hundreds place: "5". Next, look at the first number after the cut-off line: "0". If the number is 4 or below, round down to the nearest hundred: "500". Note: You are rounding to the nearest hundreds, so be sure to use 0's in the tens and ones places..
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