5分之3*( )=9*( )=0.4*( )=( )*( )=1

问题描述:

5分之3*( )=9*( )=0.4*( )=( )*( )=1

5分之3*(5/3 )=9*(1/9 )=0.4*(5/2 )=(1/4 )*(4 )=1