Answer
-1
Work Step by Step
Sum all the positive addends. Sum all the negative addends. Find the sum of the two.
$(-3)+(-9)+(+5)+(+6)=(-12)+(+11)=-1$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 2 - Section 2.1 - Addition of Signed Numbers - Exercises - Page 109: 50
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