Chemistry: A Molecular Approach (3rd Edition)

Published by Prentice Hall
ISBN 10: 0321809246
ISBN 13: 978-0-32180-924-7

Chapter 1 - Sections 1.1-1.8 - Exercises - Review Questions - Page 37: 29

Answer

Rounding down: If the last digit is less than 5, then the last digit will stay the same and all of the other digits to the right are dropped Rounding up: If the last digit is 5 or more, then the last digit will be increased by 1 and all of the other digits to the right are dropped.

Work Step by Step

Rounding down: Ex - Round 3.24 to two significant figures - 3.2 Rounding up: Ex - Round 3.46 to two significant figures - 3.5
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