Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 1 - Some Basic Concepts of Arithmetic and Algebra - 1.1 - Numerical and Algebraic Expressions - Problem Set 1.1 - Page 8: 72



Work Step by Step

For these questions, trial and error will help get the correct use of parenthesis. 1) Use brackets and parenthesis to make it clear which steps need to be done first (unless order of operations dictates a certain order. For instance, no parenthesis are needed to show that multiplication comes before addition.) 2) We solve the expressions within the brackets first and then move to division, then multiplication, and then addition. $36+12\div(3+3+6)\cdot2=38$ $36+12\div(12)\cdot2=38$ $36+[12\div(12)]\cdot2=38$ $36+[1]\cdot2=38$ $36+(1\cdot2)=38$ $36+2=38$ $38=38$
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