五年级数学下册4.4《体积单位的换算》教案北师大版.doc

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1、1体积单位的换算教学设计教学目标:1、结合实践活动,认识体积、容积单位之间的进率,会进行体积、容积单位之间的换算。 2、在观察、操作中,发展空间观念。教学重点难点:观察、操作中会进行体积、容积单位之间的换算。教具准备:课件 ppt课时安排:两课时教 学 过 程 3 分导入新课1、 常用的长度单位有哪些?相邻的长度单位之间的进率是少?2、 常用的面积单位有哪些?相邻的面积单位之间的进率是少?3、我们认识的体积单位有哪些?你能猜出相邻的两个体积单位之间的进率是多少?探究新知一、 探索立方分米与立方厘米之间的进率。1、 先自学后分组探究。(1) 、棱长是 1 分米的正方体的体积是多少?(2) 、棱长

2、是 10 厘米米的正方体的体积是多少?(3) 、1 立方分米与 1000 立方厘米,哪个大?为什么?说明了 1 立方分米=( )立方厘米。2、回顾一下自己的思维过程,说一说自己对这两个单位之间的理解。二、思考升和毫升的进率。如果一个正方体的容器从里量棱长是 1 分米,那么这个容器的容积是 1升,同样的如果一个正方体的容器从里量棱长是 1 厘米,那么这个容器的容积是 1 豪升,你知道 1 升=( )毫升,还知道什么?三、独立探究立方米与立方分米之间的进率。体积为 1 立方米的正方体,它的棱长为( )米;也可看成是棱长为( )分米的正方体,所以它的体积是( )( )( )=( )立方分米,由此得出 1 立方米=( )立方分米。板 书设 计 :体积单位的换算1 立方分米=1000 立方厘米21 升=1000 毫升1 立方米=1000 立方分米布 置作 业 :课本第 51 页的第 3 题和第 4 题课 后反 思 :学了这一课,你的收获是什么?

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