(-1)+(+2)+(-3)+(+4)+?+(-199)+(+200)怎么计算
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![(-1)+(+2)+(-3)+(+4)+?+(-199)+(+200)怎么计算](/uploads/image/z/390929-41-9.jpg?t=%28-1%29%2B%28%2B2%29%2B%28-3%29%2B%28%2B4%29%2B%3F%2B%28-199%29%2B%28%2B200%29%E6%80%8E%E4%B9%88%E8%AE%A1%E7%AE%97)
(-1)+(+2)+(-3)+(+4)+?+(-199)+(+200)怎么计算
(-1)+(+2)+(-3)+(+4)+?+(-199)+(+200)怎么计算
(-1)+(+2)+(-3)+(+4)+?+(-199)+(+200)怎么计算
这个简单,两个看做一个单位,两个两个算,前两个得1,-3和4又得1,以此类推,一共100对,所以最后答案是100