14.72÷3.2= ÷32 6.8×1.05= × 3.02÷0.5=3.02× W× =W÷0.25.
:4= ÷8== %= [填成数].
== ÷ = (小数)
==4÷ = %= (填小数).
÷ = %== 折= 小数.
=20÷ =12÷ =0.8= %