一个圆柱形粮屯，从里面量得底面的半径是和高都是2米．如果每立方米粮食重400千克．这个粮屯能装粮食多少吨？
直接写出得数．== 1﹣= 4﹣=====
计算下面各题．．
=========
++﹣+﹣+﹣．
1﹣．
=
= 1﹣
=
=
=
=
=
=
．
=
=
=
=
=
=
=
=
=
+
+
﹣
+
﹣
+
﹣
．
．
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