等底等高的圆柱体和圆锥体体积之和是28立方米,圆柱体的体积是 .圆锥体的体积是 .
75%= :4=== 小数.
=12÷9=, 5===3.
: =9× =.
5: =20÷16=25: = %= (填小数)
35: =20÷16= %= (填小数)