-8+9-10+11-12+13-14+15th

Question

-8+9-10+11-12+13-14+15th

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Answer 1

А) -8 + 9 - 10 + 11 - 12 + 13 - 14 + 15 = 4
б) 9 - 10 + 11 - 12 + 13 - 14 + 15 - 16 = -4
в) -1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 = -55