5:( )=20 ( ):12=0.25 9:( )=1/3
5:( )=20 ( ):12=0.25 9:( )=1/3
(9)÷15=3:(5)=(20)分之12=0.6=(60)%=5分之1×()=()成
12除()= ()之3=0.25=20分之() =4分之()
5:20=9/36=0.25=25%=( )成( )
3/10*( )=5*( )=( )除以1/19=0.25*( )=1
8/9-5/12= 7/15-3/20-1/20+3/15 =(7/15+3/15)-(3/20+1/20) =10/1
1 约等于( )除以4=( )/12=9:( )=百分之几=0.25
(1)20分之3:1.5=60:( )(2)( ):12分之5=10:5(3)20分之1:0.25=1:( )(4)3.
5:( )=20?( ):12=0.25 9:( )=3分之1?
3:4=():12=15除以( )=( )分之9=( ).2:4分之1、4.5:6、5:0.25化成最简整数比.0.6=
(-8/9)×(-0.25)×(-1/4)×9=?(1又3/4-0.875-7/12)×(-1又1/7)=?
5/3*( )=12/5*( )=( )*8=0.25*(