简便计算:2又五分之二×(5/6+3/4)-1/12

简便计算:2又五分之二×(5/6+3/4)-1/12
简便计算:2又五分之二×(5/6+3/4)-1/12

简便计算:2又五分之二×(5/6+3/4)-1/12
2又五分之二×(5/6+3/4)-1/12
=12/5×5/6+12/5×3/4-1/12
=2+9/5-1/12
=2+103/60
=223/60

2又五分之二×(5/6+3/4)-1/12
=12/5*(5/6+3/4)-1/12
=12/5*5/6+12/5*3/4-1/12
=2+9/5-1/12
=3又43/60对不起，题目出错了，是：2又五分之四×(5/6+3/4)-1/122又五分之四×(5/6+3/4)-1/12 =14/5*(5/6+3/4)-1/12 =14/5*5/6+14/5*3/4-...

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2又五分之二×(5/6+3/4)-1/12
=12/5*(5/6+3/4)-1/12
=12/5*5/6+12/5*3/4-1/12
=2+9/5-1/12
=3又43/60

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