电影票上“7排4号”记做(7,4),那么“6排8号”记做 .
3:5==15÷ = ÷75= (填小数)
0.75= :28== %=24÷ .
18÷ = ÷25=0.6==.
=0.25==27÷ = ÷48.
12: == : = :12.