简便运算,20分悬赏6050-6300/42(2.5-2.5*0.6)/4(315+270)/(1.3*5)我很急啊!!求你了~!!!!!!!!!!!!!!!!!!!!!!

问题描述:

简便运算,20分悬赏
6050-6300/42
(2.5-2.5*0.6)/4
(315+270)/(1.3*5)
我很急啊!!求你了~!!!!!!!!!!!!!!!!!!!!!!