5L﹣3000mL= L4000g+15kg= kg6t+7t= g8000dm2﹣25m2= dm2.
= :40= %= 折= (小数)[填小数].
== ÷ = (小数)
2÷5=== 填小数.
4÷5==== 小数.
÷12==0.75= : = 折= %