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 - 5.5 Real Numbers and Their Properties; Clock Addition - Exercise Set 5.5: 8

Answer

-3 is a rational number that is not a natural number.

Work Step by Step

Natural numbers do not contain negatives. Rational numbers can be written $\frac{p}{q}$ where q $\ne$0. Since -3 can be written as $\frac{-3}{1}$, it is considered a rational number.
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