86 + (−28) + 12 + (−34) is equal to

(a) − 36 (b) 40 (c) 36 (d) − 40

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Solution

86 + (−28) + 12 + (−34) = 86 + (−28) − (34 − 12)
= 86 + (−28) − 22
= (86 − 28) − (34 − 12)
= 58 − 22
= 36
Hence, the correct option is (c).

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