Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 1 - Section 1.11 - Rounding Numbers - Exercises: 14

Answer

(a) Hundred: $1, 500$ (b) Ten: $1, 450$ (c) Unit: $1, 452$ (d) Tenth: $1, 451.5$ (e) Hundredths: $1, 451.53$ (f) Thousandths: $1, 451.525$

Work Step by Step

(a) Hundred: $1, 500$ Explanation: The hundreds digit $4$ is followed by a $5$ so round the hundreds digit up to $5$ then replace the tens and units digit with $0$ and omit the decimals, (b) Ten: $1, 450$ Explanation: The tens digit $5$ is followed by a $1$ so retain the tens digit $5$ then replace the units digit with $0$ and omit the decimals, (c) Unit: $1, 452$ Explanation: The units digit $1$ is followed by a $5$ so round up the units digit to $2$ then omit the decimals, (d) Tenth: $1, 451.5$ Explanation: The tenths digit $5$ is followed by a $2$ so retain the tenths digit $5$ then omit the succeeding decimals, (e) Hundredths: $1, 451.53$ Explanation: The hundredths digit $2$ is followed by a $5$ so round up the hundredths digit to $3$ then omit the succeeding decimals, (f) Thousandths: $1, 451.525$ Explanation: The thousandths digit $5$ is followed by a $4$ so retain the hundredths digit, $5$, then omit the succeeding decimals.
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