计算:1又4/17*(这是乘号)(2又2/3-3/4)+17又11/12 /(这是除号)17/21

问题描述:

计算:1又4/17*(这是乘号)(2又2/3-3/4)+17又11/12 /(这是除号)17/21

原式=21/17×(8/3-3/4)+215/12÷17/21
=21/17×23/12+215/12×21/17
=21/17×(23/12+215/12)
=21/17×238/12
=21×14/12
=24.5