在横线里填上>、<或=.× ×1 ÷1 ÷ ÷ .
=21÷ = %== (填小数)
( )÷20===15:( )=( )%
=== ÷ .
= ÷5=0.8=4: = %= 折.
÷8=0.25= %= :16.