甲乙两数的比是3:5,乙数比甲数多12,甲数是 ,乙数是 .
28÷ ==2.1:2.7= :63= 0. (填循环小数)
=l8: = :20== ÷40= (填小数)
3:8=18÷ ═ %= .小数.
÷8===15÷ = ÷32= (填小数)
0.3==12÷ = :30= %