4分之()=9:()=()/20=3*()=()分之12=0.75
问题描述:
4分之()=9:()=()/20=3*()=()分之12=0.75
答
4分之(3)=9:(12)=(15)/20=3*(1/4)=(16)分之12=0.75
4分之()=9:()=()/20=3*()=()分之12=0.75
4分之(3)=9:(12)=(15)/20=3*(1/4)=(16)分之12=0.75