求下列圆锥的体积底面半径是5厘米，高是12厘米；底面周长是18.84厘米，高是8厘米．
×= 0×=÷====
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直接写出得数×3=×16=×=（+）×4=×+×=+=÷3= 4÷=
×1= 52﹣42= 0.75﹣0.5=×=÷= 125×0.08= 0.5+0.02=÷=÷= 0.15×6= 12÷0.3= 0÷=
直接写得数．×16= 12÷= 24×=×÷= 1÷=÷15=÷=×÷×=
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= 0×
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×3=
×16=
×
=（
+
）×4=
×
+
×
=
+
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÷3= 4÷
=
×1= 52﹣42= 0.75﹣0.5=
=
÷
= 125×0.08=
÷
= 0.15×6= 12÷0.3= 0÷
=
×16= 12÷
= 24×
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×
÷
=
÷15=
÷
=
×
÷
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