(5⼀6+0.75)÷5⼀4-0.8 要过程

2024-12-03 16:35:16
推荐回答(1个)
回答(1):

(5/6+0.75)÷5/4-0.8
=(5/6+3/4)/5/4-4/5
=19/12*4/5-4/5
=19/15-4/5
=7/15