Tính: 101 – 102 – (–103) – 104 – (–105) – 106 – (–107) – 108 – (–109) – 110

Câu hỏi :

Tính: 101 – 102 – (–103) – 104 – (–105) – 106 – (–107) – 108 – (–109) – 110

A. –2

B. –3

C. –4

D. –5

* Đáp án

D

* Hướng dẫn giải

101 – 102 – (–103) – 104 – (–105) – 106 – (–107) – 108 – (–109) – 110

= 101 – 102 + 103 – 104 + 105 – 106 + 107 – 108 + 109 – 110

= (–1) + (–1) + (–1) + (–1) + (–1) = –5

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