在横线上填上合适的单位名称.0.3 <0.3 <0.3 4.12 >41.2 >412 .
=10÷ == : .
8÷ === ÷20= %
=== ÷ = (小数)
=21÷ = %== (填小数)
( )÷20===15:( )=( )%