2022年2014新人教版小学六年级数学第三单元分数除法教案 .pdf
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2022年2014新人教版小学六年级数学第三单元分数除法教案 .pdf
精品教学教案第三单元分数的除法教学内容:1、倒数的认识2、分数除法3、解决问题教材分析:本单元是在学生已经掌握了分数乘法的基础上,学习倒数的认识;分数除法和分数除法知识解决实际问题。主要内容包括:分数除法的意义与计算;解决问题。三维目标:知识和技能:1、使学生理解倒数的意义,会求一个数的倒数。2、使学生理解分数除法的意义,掌握分数除法的计算法则,能熟练地进行计算。3、使学生能够用方程或算术方法解答“已知一个数的几分之几是多少,求这个数”的应用题,进一步提高学生解答应用题的能力。过程与方法:动手操作,通过直观认识使学生理解整数除以分数,引导学生正确地总结出计算法则,能运用法则正确地进行计算。情感、态度和价值观:使学生进一步受到事物是相互联系的辩证唯物主义观点的启蒙教育。教法和学法:练习法、自主探索,合作探索教学重点、难点:一个数除以分数的意义以及计算方法,并会分数除法解决相关的问题。掌握分数四则混合运算的运算顺序,能应用计算法则较熟练地进行计算。一个数除以分数的计算法则的推导。分数除法应用题的数量关系理解。工作总量用单位“1”表示及工作效率所表示的含义。授课时数:12 课时精品教学教案第 1 课时教学课题倒数的认识教学目标知识与技能引导学生通过观察、研究、类推等数学活动,理解倒数的意义,总结出求倒数的方法过程与方法通过互助活动,培养学生与人合作、与人交流的习惯;情感态度与价值观通过自行设计方案,培养学生自主探索和创新的意识。教学重点理解倒数的含义,掌握求倒数的方法。教学难点理解倒数的含义,掌握求倒数的方法。教法与学法观察、研究、类推、比较等方法进行教学教学准备及手段课件教学内容:28页倒数的认识;29 页练习六教学过程:一、导入1、课件出示。找一找下面文字的构成规律。学生分组交流,找出文字的构成规律。2、按照上面的规律填数。85()()32()()21()()3、揭示课题。今天,我们就来研究这样的数倒数。二、教学实施1、师:关于倒数,你想知道什么?2、学习倒数的含义。(1)学生观察教材第28 页主题图。文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5文档编码:CF2C4I2W9D4 HI4F4I10L1E4 ZR9C9Q1R5U5精品教学教案(2)学生根据所举的例子进行思考,还可以与老师共同探讨。(3)学生反馈,老师板书。学生可能发现:每组中的两个数相乘的积是1。每组中两个数的分子和分母的位置互相颠倒。每组中两个数有相互依存的关系。(4)举例验证。(5)学生辩论:看谁说得对。(6)归纳:乘积是 1 的两个数会为倒数。3、特殊数:0 和 1。板书:0 没有倒数,1 的倒数是它本身。4、求倒数的方法。(1)出示例 1.(2)归纳方法:你是怎样求一个数的倒数的?板书:分子和分母调换位置。5、反馈练习。(1)完成教材第 28 页的“做一做”。学生独立解答,老师巡视。(2)完成教材第 29 页练习六的第 1-5 题。三、课堂作业设计1、找一找下列各数中哪两个数互为倒数。2 348187 1 67711 0 437621 6 2、填空。(1)34的倒数是(),()的倒数是67。(2)10 的倒数是(),()的倒数是 1。(3)21的倒数是(),()没有倒数。文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 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ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8精品教学教案板书设计倒数的认识倒数的意义:乘积为1 的两个数互为倒数。0 没有倒数,1 的倒数是 1。教学反思文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8精品教学教案第 2 课时教学课题分数除以整数教学目标知识与技能引导学生在具体的情景中借助已有的经验理解分数除法的意义并掌握分数除法的计算方法,能正确计算分数除以整数。过程与方法通过富有启发性的问题情景和探索性的学习活动,引导学生主动参与、独立思考、合作交流,形成计算技能。情感态度与价值观在教学中渗透转化的思想,让学生充分感受转化的美妙与魅力。教学重点1、分数除法意义的理解;2、分数除以整数的算法的探究。教学难点分数除以整数的算法的探究。教法与学法教学准备及手段课件教学内容:30 页例题 1,做一做教学过程:一、创设情景导入:1、同学们,你们去过超市购物吗?(去过)你去买了一些什么东西呢?你有没有过相同的东西买几件的时候?能不能举个例?(指名让学生举例并用算式表示求该例的总价)二、新知探究:(一)分数除法的意义1、出示例 1 的教学挂图,让学生看图观察图意,指名口答图意和应该怎样列式。文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8精品教学教案2、(学生独立思考,口答问题和列式)3、(引导学生将整数乘除法应用题改变成分数乘除法应用题)4、引导学生观察比较整数乘除法的问题和改写后的问题,分析得出整数除法和分数除法的联系以及分数除法的意义。5、练习:(巩固加深对意义的理解)课本 28 页做一做。学生独立练习,订正时让学生说明为什么这样填。(二)、分数除以整数1、小组学习活动:活动把这张纸的45平均分成 2份,每份是这张长方形纸的几分之几?活动把这张纸的45平均分成 3 份,每份是这张长方形纸的几分之几?活动要求 先独立动手操作,再在组内交流:通过折纸操作和计算,你发现了什么规律?你有什么问题要提出来?2、汇报学习结果:活动 1 学生甲:把45平均分成 2 份,就是把 4 个15平均分成 2 份,1份就是 2 个15,就是25;用算式表示是:452=(42)/5=25学生乙:把45平均分成 2 份,每份就是45的12,就是4512;用算式表示文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8精品教学教案是:4512=410=25;学生丙:我发现了计算452 时,可以用分子42 作分子,分母不变;学生丁:我发现分数除以整数可能转化成乘法来计算,也就是乘以这个整数的倒数;活动 2:学生甲:4 要平均分成 3 份,不能直接分,我先找出4 和 3 的最小公倍数 12,把 4 分成 12 份,再把 12 份平均分成 3 份,算式可以用453表示,4 不能够被 3 整除,这道题我不知道怎样计算;学生乙:我的分法与前面的同学相同,不同的是:我在计算453 时,我把453 转化成4513来计算,因为,把45平均分成 3 份,就是求45的13是多少。讨论:1、从折纸实验和计算来看,你发现计算分数除以整数可以怎样计算?2、整数可以为 0 吗?小结并板书:分数除以一个不等于0 的整数,等于分数乘以这个整数的倒数。三、巩固与提高3、把35平均分成 4 份,每份是多少;什么数乘6 等于320?文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8精品教学教案4、如果 a 是一个不等于 0 的自然数,13a 等于多少?1a3 等于多少?你能用一个具体的数检验上面的结果吗?四、全课小结。1、通过这节课的学习,你有什么收获?2、分数除以整数的规律是怎样的?3、这节课,你还有什么不太明白的地方板书设计分数除以整数分数除以整数等于分数乘这个数的倒数。教学反思文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW4K1H6Y8U1 HG3I10D6E6M6 ZT8P8O4X7V8文档编码:CW