Answer
$56$
Work Step by Step
Using the properties of real numbers, the given expression, $
(-18+56)+18
,$ simplifies to
\begin{array}{l}\require{cancel}
(-18+18)+56
\\\\=
0+56
\\\\=
56
\end{array}
Elementary Algebra
by Kaufmann, Jerome; Schwitters, Karen;
Published by
Cengage Learning
ISBN 10:
1285194055
ISBN 13:
978-1-28519-405-9
Chapter 1 - Some Basic Concepts of Arithmetic and Algebra - 1.5 - Use of Properties - Problem Set 1.5 - Page 33: 13
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