7⼀9×15⼀11+7⼀9×4⼀11简便计算

2024-12-25 22:37:13
推荐回答(1个)
回答1:

5/9×7/11+7/9×4/11 =5*7/9*11+7*4/9*11 =(5+4)*7/9*11 =7/11