[2⼀1+(8⼀7-16⼀1)]*7⼀4

2024-12-26 00:56:11
推荐回答(1个)
回答1:

[1/2+(7/8-1/16)]*4/7
=[1/2+7/8-1/16]*4/7
=[8/16+14/16-1/16]*4/7
=21/16*4/7
=3/4