0.3:1的前项扩大10倍,要使比值不变,后项1也应该 .
÷8==0.375=9÷ =.
= ÷ =9: == %= 折.
= ÷ = (填小数)
12÷ =0.75== :36= %
÷ =0.125=2÷ == %