简便运算:5⼀9-5⼀11+7⼀11+4⼀9

2024-12-20 13:40:16
推荐回答(1个)
回答1:

5/9-5/11+7/11+4/9
=5/9+4/9+(7/11-5/11)
=1+2/11
=13/11