把一个分数的分子扩大5倍,分母缩小5倍,这个分数的值就( )
= : ==6÷ .
0.6==18÷ = :10= %
:8=0.8: =0.2= .
8: ===2.4÷ = (填小数)
%= ÷ =六成= +.