甲数是乙数的7倍,乙数就是甲数的. .(判断对错)
= : =9÷ = %.
a除以b的商是,a和b的比是 .
÷5=0.6= %═12÷ .
18÷48=6: = :8== %
4: =0.4= ÷60== %.