Thinking Mathematically (6th Edition)

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

Chapter 5 - Number Representation and Calculation - Chapter Summary, Review, and Test - Review Exercises - Page 244: 25



Work Step by Step

Evaluate the expression: -6 + (-2)$\times$5 The text uses a dot for multiplication instead of the "x" Use the order of operations. There are no operations withing grouping symbols, nor are their any exponents. So, we move to step 3, multiply/divide left to right as you come to it. -6 +(-2)$\times$5 Starting at the left and moving right, we have addition and then multiplication. The multiplication comes first. (-2) x 5 = -10. Now, we have -6 + (-10). SInce both numbers are negative and we are adding, we add 6 + 10 and get 16. And, since they are both negative, our answer must also be negative. Therefore, the answer is -16
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