二分之一,三分之一,四分之一,六分之一=十二分之七
二分之一,三分之一,四分之一,六分之一=十二分之七
其他人气:401 ℃时间:2019-12-16 10:52:56
优质解答
1/2-(1/3-1/4)+1/6=7/12
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