先给20,

问题描述:

先给20,
0.63÷()=18分之()=0.45=():()=()%
············ - - 分母是小数?

答:本题的关键是0.45
0.63÷( 1.4 )=18分之( 8.1 )=0.45=( 9 ):( 20 )=( 45 )%