圆柱与圆锥的底面积相等,圆柱的高是圆锥高的,则圆锥的体积和圆柱的体积相等. .
0.25== %= ÷ = : .
÷12==0.5= %= : .
=3÷ = %
= :8=0.375=12÷ = %
= ÷12== (填小数)