把0.45,4.5%,0.455从小到大排列是 .
%=0.4= :5=14÷ =.
21÷ = :30== %== (填小数)
12: =1÷ === %
:10= ÷5== %=0.6= 成= 折.
6÷ ==75%=18: = [填小数].