请大家帮帮忙吧!要过程

2024-12-27 07:48:33
推荐回答(1个)
回答1:

19/20-(3/5+2x1/8)
=19/20-(3/5+1/4)
=19/20-(12/20+5/20)
=19/20-17/20
=2/20
=1/10