Answer
$55$
Work Step by Step
Using integer operations, the given expression, $
6\cdot7+5\cdot8-3\cdot9
,$ simplifies to
\begin{array}{l}\require{cancel}
42+40-27
\\\\=
82-27
\\\\=
55
.\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 - 1.1 - Numerical and Algebraic Expressions - Problem Set 1.1 - Page 6: 11
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