28÷ ==2.1:2.7= :63= 0. (填循环小数)
7÷13的商用分数表示是: .
: =0.125=3÷ = :16.
18÷ == :75= %= 折.
14÷ =0.35= :60= %= : .
÷ == (填小数)== ÷24.