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-1+2-3+4-5+6-7+8-.-99+100的简便运算方法

2025-03-14 21:38:03

推荐回答（1个）

回答1：

-1+2-3+4-5+6-7+8-.-99+100
=（-1+2）+（-3+4）+（-5+6）+（-7+8）+.+（-99+100）
=（-1）+（-1）+（-1）+（-1）+.+（-1）
=（-1）*50
=-50

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