2022年人教版三年级数学上册第二单元教案 .pdf

学习好资料欢迎下载电子备课第二单元教案学科：数学年级：三年级主备人：鞠玉梅执教人：单元课题万以内的加法和减法（一）教学内容分析本单元主要教学万以内口算两位数加、减两位数，笔算几百几十加、减几百几十以及加减法估算。本单元教材在有以下几个特点：1、联系学生的生活实际，为新知识的学习提供丰富的现实背景。数学课程内容的呈现应贴近学生的生活，让学生在生动、丰富的背景中学习数学，感受数学与现实的联系，体会数学的价值，是教材编写的基本原则。本单元遵循这一原则，为计算教学设计了坐船出游、收集矿泉水瓶等情境。使学生一方面感受到计算与生活的联系，同时受到爱护环境的思想教育。2、重视学生已有的知识和经验，注意体现算法多样化。本单元在教学口算两位数加、减两位数时，既呈现了口算方法，还出现了在脑中想竖式的方法；在教学笔算几百几十加、减几百几十时，还出现口算的方法。其目的就是鼓励学生展开思路，在交流、比较的基础上不断地完善自己的想法，学习计算方法。3、重视估算意识的培养。在二年级上册100 以内的加、减法中已正式出现过估算的教学内容，本单元结合几百几十的加、减法，进一步学习根据具体情境运用估算解决实际问题。学习好资料欢迎下载教学目标设计1、使学生能够正确口算两位数加、减两位数(和在 100 以内)，会正确计算几百几十加、减几百几十。2、使学生能够结合具体情境，进行加、减法估算，培养估算意识。3、培养学生根据具体情况选择适当方法解决实际问题的意识，体验解决问题策略的多样性。教学重难点分析重点：正确口算两位数加、减两位数，会正确计算几百几十加、减几百几十。难点：根据具体情况选择适当方法解决实际问题的意识，体验解决问题策略的多样性。教法学法设计1、充分利用学生已有的知识学习新知识。口算两位数加、减两位数，本质上都是两位数加、减一位数、整十数两种情况的组合。如 23+31，可以分解为 23+30=53,53+1=54。而笔算几百几十加、减几百几十的，是两位数加、减两位数的拓展，它们的算理完全相同，可以通过迁移类推来学习。因此教学时，应注意相关内容的复习。2、注意把握好计算教学的要求。本单元计算教学的内容呈现算法多样化的特点，在教学时，一方面应尊重学生的个性差异，允许他们采用不同的算法进行计算，同时也应注意把握好教学要求，如教学几百几十加、减法时，主要以教学笔算为主，口算是作为另一种算法出现，因此对于这类计算，只要求学生掌握笔算，对于口算不作为共同要求。课时安排共 7 课时。1.两位数加两位数-（1 课时）文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6文档编码:CV4T3K3H10D1 HA3Y8U1T6A5 ZZ3Z3L8R4J6学习好资料欢迎下载2.两位数减两位数-（1 课时）3.两位数加减两位数练习课-（1 课时）4.几百几十加、减几百几十-（1 课时）5.估算三位数加、减三位数-（1 课时）6.练习课-（1 课时）7.整理和复习-（1 课时）电子备课课时教案执教人：2015 2016 学年学科数学年级三主备人单位硖小拟授课时间：姓名鞠玉梅课题两位数加两位数个性化修改教学目标1.使学生掌握口算两位数加两位数的计算方法，并能正确地进行口算。2.能够从生活中发现数学问题，整理、分析数据，解决实际问题。3.培养学生解决问题方法多样化，提高思维的灵活性。教学重点1.正确地进行两位数加法的口算。2.能够根据具体情况选择适当的解决问题的方法。教学难点1.培养学生的口算能力。2.培养学生的操作、观察、推理的能力及善于动脑的良好学习习惯和对数学的学习兴趣。教学准备课件文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6学习好资料欢迎下载教学过程一、新课导入用两位数加、减整十或一位数。35+40=64+5=48+30=79+4=53+40=66+8=二、探究新知1两位数加两位数不进位口算方法。（1）观察教材第9 页的主题图，从图中你获得了哪些消息？学生汇报。（一至五年级参加“世博会”的各班人数）（2）出示问题：一年级一共要买多少张车票？（3）提问：如何解决这个问题？生：求一共多少张车票就是求一年级一共有多少人，一年级一班35人，二班 34 人，用加法计算，列式：35+34。（4）这个算是如何计算？互相交流算法。师：我们学习过两位数加整十数、两位数加一位数，通过观察我们知道 35+34中的两个加数没有一个是整十数或一位数，但是我们是否可以把它们转化成我们学习过的加法然后进行计算呢？如果可以怎么计算？生：可以把其中的一个加数拆分成整十数加一位数。比如34 可以看成 30+4，先算 35+30=65，再算 65+4=69。师：除了这种方法以外，还有别的方法吗？生 1：还可以拆分另一个加数35，把 35 看成 30+5，先算 30+34=64，再算 64+5=69。生 2：除此之外，同时把这两个加数拆成整十数加一位数，然后进行文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6学习好资料欢迎下载计算也很简便，34 看成 30+4，35 看成 30+5，先算 30+30=60，4+5=9，再算 60+9=69。2两位数加两位数的进位口算方法。（1）出示问题：二年级一共要买多少张车票？（2）列式计算：39+44（3）学生尝试计算39+44，并说说算法。经学生自由讨论，大致有以下几种方法。A.39+40=79 79+4=83 B.30+44=74 74+9=83 C.30+40=70 9+4=13 70+13=83 3比较算式，发现规律。师：对比两个算式，它们有什么相同和不相同的地方？相同点：都是两位数加两位数。不同点：前者个位数相加不进位，后者个位数相加进位。三、知识应用1做一做.三年级一共要买多少张车票？.四年级一共要买多少张车票？.你能提出其他数学问题并解答吗？2说一说，再算一算。23+46=63+17=3填一填。（课本练习一第 1 题）4知识应用（出示课件解决问题）文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6学习好资料欢迎下载我和爸爸去海洋馆。成人票每人35元，儿童票每人 18元，我和爸爸一共要花多少钱？四、课堂小结1在这一节课中，我们学习了两位数加两位数，以及它们的计算方法，我们要利用这个计算方法，熟练地进行计算。2 你喜欢哪种方口算方法？五、布置作业第 12页练习二，第 24 题。板书设计两位数加减两位数35+34=69 第一种算法：35+30=65 65+4=69 第二种算法：30+30=60 5+4=9 60+9=69 35+34=6 9 35 +34=6 9 30 4 30 5 30 4 65 60 9 39+44=83 第一种算法：39+40=79 79+4=83 第二种算法：30+40=70 9+4=13 70+13=83 39 +44=83 39 +44=83 （）（）（）（）（）（）（）（）（）文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6学习好资料欢迎下载教后反思电子备课课时教案执教人：2015 2016 学年学科数学年级三主备人单位硖小拟授课时间：姓名鞠玉梅课题两位数减两位数个性化修改教学目标1能正确口算百以内的两位数减两位数。2经历探索两位数口算方法的过程，体会算法的多样化。3增强学生讲所学知识应用于生活的意识及创新意识。4培养学生的口算能力、解决问题的能力。5.培养学生的操作、观察、推理的能力及善于动脑的良好学习习惯和对数学的学习兴趣。教学重点学会两位数减两位数的口算方法。教学难点培养学生的计算能力以及解决问题的能力。教学口算卡片、课件文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6文档编码:CR8K7Q9T3E3 HI8T1V5S9G10 ZC2D1R1Q5G6学习好资料欢迎下载准备教学过程一、复习旧知1口算并谈一谈你是怎样算的。55-30=24-5=84-30=19-4=73-40=43-7=二、探究新知1获取信息，理解题意。谈话：请同学们阅读教材第11 页的例 2内容，说一说从图文中你获得了哪些信息？（出示课件）（专线大巴票价：48 元，普通快客票价：65 元，动车票价：54 元）提问：我们需要解决的问题是什么？（1）普通快客的票价比动车贵多少元？（2）专线大巴的票价比普通快客便宜多少元？2 尝试解决，探究算法。（1）两位数的不退