2⼀3+括号4⼀5-2⼀3括号乘5⼀3简便计算

2024-11-25 05:33:38
推荐回答(1个)
回答1:

2/3+(4/5-2/3)x5/3
=2/3+(12/15-10/15)x5/3
=2/3+2/15x5/3
=2/3+2/9
=6/9+2/9
=8/9