为落实“双减”政策中减负增效的实践作业要求，探索实现数学新课程标准中培养学生创新精神和实践能力的这一重要目标之路，渭南高新区第一小学六年级数学老师结合本学期“圆柱和圆锥”教学内容，设计了“玩转柱锥”为主题的实践作业活动。

活动一：滚一滚

利用滚动法求圆柱的侧面面积，学生通过观察滚动所形成的图形，进一步了解圆柱侧面的特性。

活动二：剪一剪

学生利用现成的圆柱模型，沿着不同方向将侧面剪开，观察比较展开图的异同点，并体验圆柱侧面积、表面积计算公式的推导过程。

活动三：切一切

学生按不同方式将生活中的“圆柱”和“圆锥”切开，探究截面，了解“截面”的产生过程，体会“面源于体”。

活动四：拼一拼

我们能把一个圆采用“化曲为直”的思想方法推导面积计算公式，同样，让学生用转化思想，通过动手实践，推导圆柱体积计算公式。

活动五：做一做

学生在了解了圆柱、圆锥特点之后，制作圆柱与圆锥创意作品，提高学生的实际操作能力，让学生充分参与到“做数学”的活动中。

活动六：画一画

圆柱与圆锥知识点多而杂，但知识点之间不是孤立的，让学生从多维度对圆柱和圆锥的知识点进行整理，找出知识点之间联系，绘制思维导图，编织自己的知识网。

此次实践活动中，同学们不断在做中学，学中思，思中悟，进一步理解了圆柱和圆锥的特征，发现了两者之间的联系和区别，发展了空间想象能力、逻辑推理能力，体会了数学的应用价值，让学生得以跳出课堂，放飞手脑，去探索更广阔的数学世界!

撰稿：冯琳

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尚栏庆1434关于圆锥或圆柱的课外知识 -
政习伟18811338765 ______ 圆锥是铅锤常用的形状,在建筑行业常用来检查墙壁的垂直度. 圆柱常做为“滚木”是运输行业常用的工具,用来移动笨重的物品. 不过现在有更先进的工具了.以上用法只是在落后地区才继续使用.

尚栏庆1434数学圆柱与圆锥知识 -
政习伟18811338765 ______ 3.14*10*15=471 3.14*5*5*2=157 471+157=628 第二个高看不清, 3.14*2*2*15*1/3*2=125.6 3.14*5*5*3+3.14*5*5*9*1/3=157

尚栏庆1434圆柱知识请写一些关于圆柱的知识,越多越好. -
政习伟18811338765 ______[答案] 圆柱的定义 以矩形OO'AB的一边AB绕着另一条边OO'旋转360°,所得到的空间几何体叫做圆柱,OO'叫做圆柱的轴,OO'的长度叫做圆柱的高,所有平行于AB的线段叫做圆柱的母线,OA和O'B旋转形成的两个圆叫做圆柱的底面,AB旋转形成的面叫...

尚栏庆1434小学6年级数学关于圆柱与圆锥的知识 -
政习伟18811338765 ______ 圆锥的底面圆的半径是18.84÷2÷3.14=3米 圆锥的底面积是3.14*3²=28.26平方米 圆锥的体积是1/3*28.26*6=56.52立方米

尚栏庆1434一个圆柱与一个圆锥的体积相等,底面积相等,圆锥的高是圆柱的高的(?
政习伟18811338765 ______ 圆锥体积公式1/3πr^2h圆柱体积公式πr^2h所以同样底面积和高的圆柱和圆锥,圆柱的体积是圆锥的3倍,圆柱与圆锥的底面积相等,体积相等,那么圆锥的高度是圆柱高的(3倍).

尚栏庆1434数学六年级关于圆柱圆锥的知识 -
政习伟18811338765 ______ V柱=底面积*高(π V=锥1/3*底面积*高

尚栏庆1434想一想,圆柱与圆锥有哪些区别 -
政习伟18811338765 ______ 圆柱和圆锥有什么相同点和不同点 相同点: 1.底面都是圆形; 2.侧面都是曲面. 不同点: 1.圆柱有两面个底面,圆锥只有一个底面. 2.圆柱的侧面展开图是长方形,圆锥的侧面展开图是扇形.

尚栏庆1434一个圆锥和一个圆柱,底面积和高都相等,高也相等,已知它们的体积之?
政习伟18811338765 ______ V圆柱=S圆柱地面积*h圆柱高 V圆锥=1/3*S圆锥底面积*h圆锥高 解:因为 S圆柱地面积=S圆锥底面积 h圆柱高=h圆锥高所以 V圆柱=3V圆锥4V圆锥=48所以 V圆锥=12 V圆驻=3*12=36

尚栏庆1434圆柱和圆锥的体积相等,圆柱与圆锥底面周长的比是5﹕3,圆锥高是2?
政习伟18811338765 ______ 分析:因为圆柱与圆锥底面是圆,周长比等于半径比,面积等于半径的平方比,也就是说圆柱与圆锥底面周长的比是5﹕3,那么,圆柱与圆锥底面积的比是5²:3²=25:9.可以把圆柱的底面积看作25cm²,圆锥的底面积看作9cm²,因此它们的体积是1/3*9*27=81cm³,从而可以求出圆柱的高.圆柱与圆锥底面积的比是5²:3²=25:9圆柱和圆锥的体积是:1/3*9*27=81(cm³)圆柱的高:81÷25=3.24(cm)答:圆柱的高是3.24厘米.

尚栏庆1434一个圆柱与一个圆锥的底面积和体积分别相等已知圆柱的高是四分米圆?
政习伟18811338765 ______ 圆锥的高是 4x3=12分米 追答 : 等地等高的圆锥体积是圆柱的 1/3所以 4÷1/3=12分米 这个不用公式