把0.016扩大 倍是16,把6.25缩小10倍是 .
3: ==24÷ = %=0.8.
a除以b的商是2,a就是b的2倍. .
== %=40: = (填小数)
0.6== :10=4.5÷ = %
÷20=6÷8=== :4.