(6⼀7-1⼀3)×2.8用简便计算怎么算?

2024-11-25 19:55:15
推荐回答(1个)
回答1:

(6/7-1/3)×2.8
=(6/7-1/3)×28/10
=(6/7-1/3)×14/5
=6/7×14/5-1/3×14/5
=12/5-14/15
=36/15-14/15
=22/15