163又1/13÷41又1/39用简便计算怎么做?

分类: 作业答案 • 2023-01-18 14:24:54

问题描述：

答

163又1/13÷41又1/39
=(163x13+1)/13x39/(41x39+1)
=(163x13+1)x[3/(41x39+1)]
=2120x[3/1600]
=(53x3)/40
=159/40