求图中图形按图中所示方向旋转一周后所形成的立体图形的体积．（单位：厘米）
把带分数化成假分数．2= 3= 1= 4=
数的改写．（1）把下面的分数化成小数，小数化成分数．==0.28=0.035=（2）把下列分数中的假分数化成带分数，带分数化成假分数．====
把假分数化成带分数或把带分数化成假分数．====
把假分数化成带分数或把带分数化成假分数．= = = = =
把下列带分数或整数化成假分数= 1=
= 3
= 1
= 4
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