2021年分数除法一教学设计.pdf

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2021年分数除法一教学设计.pdf

分数除法一教学设计安吴小学昝凡教学内容：分数除以整数课型：新授教学目标1、探索并掌握分数除以整数的计算方法和意义。2、通过涂一涂、算一算、小组合作交流等活动探索并理解分数除法意义。3、培养学生合作探究的能力。教学重点掌握分数除以整数的计算方法和意义教学难点理解分数除以整数的意义。关键进行小组交流合作的“涂一涂、算一算”探究活动教学准备教师教材学生教材练习本一、复习导入1、把 14 平均分成 2 份，每份是多少？2、18里面有多少个 2？我们已经理解了整数除法的意义，掌握了整数除法的计算方法，今天我们一起来学习分数除法一，看看它们之间有什么联系。二、探究新知，合作交流动手画一画一张纸的4/7，把这其中的 4 份平均分成 2 份，涂一涂。|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 1 页，共 4 页想一想：4/7 里有 4 个 1/7，平均分成 2 份，每份是 2 个 1/7，是 2/7。用算式怎么表示？4/722/7 三、大组汇报，质疑问难（通过这道题，我们知道分数除以整数跟整数除以整数除法的意义相同）出示：把一张纸的4/7 平均分成 3 份，每份是这张纸的几分之几？生：理解题意，动手画4/7，把这其中的 4 份平均分成 3 份，涂一涂你发现了什么？生：我发现了涂颜色的部分是这张纸的4/21.从图上可以看出是4/21，这说明了什么？说明每份是 4/7 的 1/3，也就是把 4/7 平均分成 3 份，就相当于 4/7的 1/3 师：用算式怎么表示生：4/73=4/71/3=4/21 算完后你发现了什么？生：我发现了除以一个整数（0 除外）等于乘这个数的倒数。四、巩固练习，拓展提高填空|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 2 页，共 4 页文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K61、分数除法的意义与整数除法的意义（），都是已知（）和（），求（）的运算。2、分数除以整数（0 除外），等于分数（）这个整数的（）。3、8/94=8/9（）=（）4、5/62=5/6（）=（）5、教材 26 页“练一练”的第一题（巩固分数除以整数的计算方法）6、教材 26 页“练一练”第二题让学生独立解决（进一步加深理解分数除法的意义）7、教材 26 页“练一练”第三题（设计这道题的主要目的是渗透分数除法与分数乘法的联系，也是为后面用到列方程解决问题作铺垫）检测：计算3/43五、课堂小结，知识检测拓展提高：如果 a 是一个不为零的自然数，那么1/3 a 等于多少？1/a 3 等于多少？板书内容设计分数除法一分数除以整数分数除以整数（0 除外）等于乘这个数的倒数。|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 3 页，共 4 页文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 HP4C1A10X7Q6 ZU4G2R1X7K6文档编码:CM10H5P8X5B10 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