calculate 1 - 2 + 3 - 4 + 5 - 6 + .............. + 179 - 180
Answers
Answered by
11
First time - Second term = -1 ...so net sum = 90× 1 = 90
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Answered by
3
Answer:
-90
Step-by-step explanation:
as given 1-2+3-4+5-6......+179-180
=-180's half that is -90
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