#### Answer

$+$ : 28
$-$ : 14
$\times$ : 147
$\div$ : 3

#### Work Step by Step

Substitute the given values and solve.
$a+b=21+7=28$
$a-b=21-7=14$
$a\times b=21\times7=147$
$a\div b=21\div7=3$

Published by
Pearson

ISBN 10:
0321955048

ISBN 13:
978-0-32195-504-3

$+$ : 28
$-$ : 14
$\times$ : 147
$\div$ : 3

You can help us out by revising, improving and updating this answer.

Update this answerAfter you claim an answer you’ll have **24 hours** to send in a draft. An editor
will review the submission and either publish your submission or provide feedback.