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Question
Find the sum of (- 11) + ( + 4) + (- 9) + (+ 7)
Sum
Solution
(- 11) + ( + 4) + (- 9) + (+ 7)
= (- 11) + (- 9) + ( + 4) + (+ 7)
= (- 20) + (+ 11)
= - 9.
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