Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 5 - Number Theory and the Real Number System - Chapter Summary, Review, and Test - Review Exercises: 92

Answer

$1-3=-2$, which is not a whole number. Thus, the whole numbers are not closed with respect to subtraction.

Work Step by Step

RECALL: The whole numbers are $0, 1, 2, 3, ...$. Note that $1-3=-2$, which is not a whole number. Thus, the whole numbers are not closed with respect to subtraction.
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