Algebra 1

by Hall, Prentice

Published by Prentice Hall

ISBN 10: 0133500403

ISBN 13: 978-0-13350-040-0

Chapter 1 - Foundations for Algebra - 1-2 Order of Operations and Evaluating Expressions - Lesson Check - Page 13: 8

Answer

$23-8*2+9$ is not equal to $15*2+9$ $23-8*2+9=16$

Work Step by Step

Order of operations means that 8 must be multiplied by 2 first. The student solved the expression left to right, ignoring order rules, leading to the mistake. $23-8*2+9=23-16+9$ $23-16+9=7+9$ $7+9=16$

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