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8 October, 08:01

How to evaluate:

A) 1 + 2 + 3 + 4 + ... + 99 + 100 + 99 - 98 - ... - 2 - 1?

B) 1 - 2 + 3 - 4 + 5 - 6 + ... - 98 + 99?

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  1. 8 October, 09:44
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    A) 1 + 2 + 3 + 4 + 89 + 99 + 100 + 99 - 98 - 198 - 2 - 1?

    B) 1 - 2 + 3 - 4 + 5 - 6 + 101 - 98 + 99?
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