沧海一笑-
幼苗
共回答了21个问题采纳率:81% 举报
191919/767676分-1919/(7676/1919)
=19*10101/(76*10101)-1919/(76*101/(19*101))
=19/76-1919/(76/19)
=1/4-1919/4
=-1918/4
=-479-3/4
191919/767676分-(1919/7676)/1919
=19*10101/(76*10101)-1/(4*1919)
=1/4-1/(4*1919)
=1919/(4*1919)-1/(4*1919)
=959/3838
1年前
6