一个圆锥的体积是18立方厘米,高是3厘米,底面积是 平方厘米.
=0.375= :16= %
0.6== ÷30= %
9÷ =0.75= :24= %= 折.
9÷ =0.75== :36= %
6÷ = /16=0.25= :4= %