简算:(19/91+1919/9191+191919/919191)÷19191919/91919191

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/09 05:00:38
简算:(19/91+1919/9191+191919/919191)÷19191919/91919191

简算:(19/91+1919/9191+191919/919191)÷19191919/91919191
简算:(19/91+1919/9191+191919/919191)÷19191919/91919191

简算:(19/91+1919/9191+191919/919191)÷19191919/91919191
(19/91+1919/9191+191919/919191)÷19191919/91919191
=19/91×3÷19/91
=3

-191919/919191-(-19191919/91919191)= -191919/919191-(-19191919/91919191) =-191919/919191+19191919/91919191 =-19*(10000+100+1)/91*(10000+