(2⼀9+1⼀6)÷7⼀2简便计算

2024-11-18 23:23:31
推荐回答(2个)
回答(1):

(2/9+1/6)×2/7
=2/9×2/7+1/6×2/7
=4/63+1/21
=4/63+3/63
=7/63

回答(2):

1/10