205g= kg 380mL= L90cm= m 8500cm2= m20.0036km= m 0.3元= 分.
=5:8= %= ÷32=0.625.
4÷ == :15== %=( 小数)
12: ==0.6=48÷ .
:30=30÷ === (小数)= 折.
75%= (小数)= (成数)= (折数)= : .