小强的年龄是爷爷年龄的,也就是说,小强的年龄与爷爷年龄的比是 .
÷5=6: =0.6== :15.
3÷4= (填分数)= (填小数)
= ÷ == (最后一空填小数)
1.75=7÷ = =28÷ = .
: =2= ÷10= %