Answer
$+$ : 28
$-$ : 14
$\times$ : 147
$\div$ : 3
Work Step by Step
Substitute the given values and solve.
$a+b=21+7=28$
$a-b=21-7=14$
$a\times b=21\times7=147$
$a\div b=21\div7=3$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 1 - Section 1.8 - Introduction to Variables, Algebraic Expressions, and Equations - Exercise Set - Page 81: 1
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