#### Answer

-10

#### Work Step by Step

Finding the sum of -31, -9, 30 can be written as $-31+(-9)+30$.
$-31+(-9)+30=-(31+9)+30=-(40)+30=-40+30=30+(-40)=-10$

Published by
Pearson

ISBN 10:
0321726391

ISBN 13:
978-0-32172-639-1

-10

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