一根绳子,用去它的,还剩米.… 甲数比乙数多,乙数是甲数的.… .
== ÷ ═= (填小数)
3.5==( )÷6=( ):( )最简比.
÷40= = :16= %=0.375.
= ÷48.
== ÷ .