在横线里填上适当的数.32m2= dm2; 400cm2= dm2; 1800dm2= m2;4m230dm2= dm2; 7米= 分米; 6dm28cm2= cm2.
9÷ =75%= :8== (填小数)
= (小数)
÷ ==== (小数)
=8÷10= %= : .
根据分数与除法的关系, ÷ =.