1.计算下面各题,怎样简便就怎样算。7⼀9ⅹ2⼀3-2⼀9

2025-02-24 22:19:31
推荐回答(1个)
回答1:

7/9×2/3-2/9
=2/9×7/3-2/9
=2/9×(7/3-1)
=2/9×4/3
=8/27