1998/(1998+1998/1999)+1/2000=?
如题
人气：199 ℃ 时间：2019-10-11 19:44:06
解答
先化简前面一部分,上下同乘1999得到 (1998*1999）/[(1998*1999)+1998]
=(1998*1999）/(1998*2000)=1999/2000
再加上1/2000就等于1
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