InterviewSolution
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Calculate: 1 – 2 + 3 – 4 + 5 – 6 + 7 – 8 + 9 – 10 |
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Answer» 1 – 2 + 3 – 4 + 5 – 6 + 7 –8 + 9 – 10 = (1 – 2) + (3 – 4 ) + (5 – 6) + (7 – 8) + (9 – 10) = (–1) + ( –1) + (–1) + (–1) + (–1) = –5. 1 – 2 + 3 – 4 + 5 – 6 + 7 – 8 + 9 – 10 = (1 + 3 + 5 + 7 + 9) – (2 + 4 + 6 + 8 + 10) = 25 – 30 = –5. |
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