Answer
$81$
Work Step by Step
Using integer operations, the given expression, $
(15-6)(13-4)
,$ simplifies to
\begin{array}{l}\require{cancel}
(9)(9)
\\\\=
81
.\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: 14
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