4m3= dm3; 321dm3= m3;3200m1= 1; dm3=0.65l.
= :24=24: == %= (填小数)
1: ==25÷ = %=二成.
=40: = ÷40= %= (填小数)
=12: =1.2= ÷20= %
= (填小数)= 折.