要使9□4÷3的商中间有0,□里可以填 .
24: == ÷1.2= 折=75%
= ×=36÷ = :13.5.
÷20=0.4= %=2: .
已知m÷n=7…1,则m÷n=.
6÷ =0.75= %= : =.