[17/25-(2/5+3/20]×2/13

来源：学生作业帮助网编辑：六六作业网时间：2024/12/23 03:08:31

[17/25-(2/5+3/20]×2/13[17/25-(2/5+3/20]×2/13[17/25-(2/5+3/20]×2/13[17/25-(2/5+3/20)]X2/13=[17/25-11/

[17/25-(2/5+3/20]×2/13
[17/25-(2/5+3/20]×2/13

[17/25-(2/5+3/20]×2/13
[17/25-(2/5+3/20)]X2/13
=[17/25-11/20]X2/13
=13/100X2/13
=1/50