来自范国闯的问题
163又1/13÷41又1/39用简便计算怎么做?
163又1/13÷41又1/39用简便计算怎么做?
1回答
2020-03-24 09:36
163又1/13÷41又1/39用简便计算怎么做?
163又1/13÷41又1/39用简便计算怎么做?
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