12÷(1-4分之3)
=12÷4分之1
=48 吨
食堂运来一堆煤,5天用去了四分之三,还剩下12吨,食堂一共运来多少吨煤
食堂运来一堆煤,5天用去了四分之三,还剩下12吨,食堂一共运来多少吨煤
数学人气:528 ℃时间:2019-09-30 19:32:14
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