袋子里有 球和 球,任意摸一个,可能摸出红球也可能摸出白球.
21÷ ==28: =( )%=0.875.
25%=3÷ = :16= :24.
:24== %= (小数)
1.25==15: = %.
3÷ =6: ==0.75= %