三年级数学下册3.3《队列表演(二)》教学设计北师大版.doc

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1队列表演(二)课题 三、乘法第 3 课时:队列表演(二) 内容 课型 新授教学目标1、 结合“队列表演(二)”的情境,探索两位数乘两位数的竖式计算方法,并能正确的进行计算。2、能结合点子图说明乘法竖式中的每一步的意思,理解算理。重点 将计算步骤与点子图相对应,直观理解竖式笔算的算理。难点每一次数字运算的结果都应该写在它合适的位置。教师 课件教学准备 学生 教材环节时间教学内容 师生活动 复案515155一、情境引入二、探究新知个人学习一、情景引入出示 1412,能用竖式计算吗?二、教学新课1、学生独立尝试用竖式计算,边写边想:这么写的道理。2、指名板演,并说说这么写的道理。(1)把 12 分成 10+2,用个位的 2 成 14,就是已经学过的一位数乘两位数。十位数字 1(也就是 1 个 10 )乘 14,所得的积是 14 个 10,因此“4”写在十位上。(2)还可以简单写成3、完成算一算学生独立完成,集体展示,互相评价。三、巩固应用预设12 分成 10+2,分别成 1421、完成练一练第 1 题。2、完成练一练第 3 题:看图,说说看懂了什么?独立完成。集体订正。3、完成练一练第 2 题四、课后作业完成练一练第 4、5 题。板书设计三、乘法第 3 课时:队列表演(二)课后反思

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