用简便方法算9⼀19×23分之6 17⼀19乘以二十

用简便方法算9/19×23分之6 17/19乘以二十
2024-12-25 17:11:30
推荐回答(1个)
回答1:

9/19×6/23+17/19×20
=54/(19×23)+340/19

=(54+340×23)/(19×23)
=7874/437