Elementary Technical Mathematics

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

Chapter 1 - Section 1.12 - Multiplication and Division of Decimal Fractions - Exercises - Page 71: 15

Answer

7.80

Work Step by Step

$\frac{27.5+136.2}{0.48+20.5}=\frac{163.7}{20.98}=7.8\underset\uparrow02669208$ To round to 3 significant digits, count 3 digits from the left. We are rounding to the hundredths position. The next digit to the right is less than 5, so drop that digit and all other digits to the right.
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