2014新人教版三年级上册第四单元教案-(1).pdf

第四单元教学计划单元教学内容:教材第 36 页至第 49 页。教材分析:本单元主要教学万以内的加法和减法(二)。这个单元主要学习三位数加、减三位数中连续进位加法和连续退位减法。本单元是在前面学习了“万以内的加法和减法(一)”的基础上学习的,为今后学生能自主进行更大数的计算打基础。教学目标:1、会 正 确 计 算 三 位 数 加、减 三 位 数，及 掌 握 连 续 进 位 加 法 和 连续 退 位 减 法。2、理解验算的意义,进一步理会估算的基本方法,增强估算意识。3、经历与他人交流各自算法的过程,会对加法和减法进行验算,养成检验和验算的习惯。4、在合作学习中增强对数学学习的兴趣。重点难点:教学重点：1、掌握连续进位加法和连续退位减法的计算方法。2、掌握被减数中间有“0”的连续退位减法的计算方法。教学难点：1、理解进位加法和退位减法的算理,归纳并灵活运用法则进行计算。2、探索验算的多种方法,掌握加法的验算方法,理解并掌握加法的两种验算方法进度安排:本单元教学分 9 课时进行课题：三位数加三位数(不连续进位)教学内容例 1、2单 元第几课时第一课时教学目标知识与技能使学生较透彻地理解万以内笔算加法的计算法则。过程与方法能应用法则准确地计算三位数不连续进位的加法题情感态度与价值观培养学生认真仔细的学习习惯，提高学生的计算水平。课的类型新授课学情分析学生已有两位数加法的计算方法教学重、难点教学重点：能应用法则准确地计算三位数不连续进位的加法题。教学难点：哪一位上的数相加满十，要向前一位进1，而且在前一位上的数相加时，要记得加上进上来的1教法、学法先学后教教学准备及用具挂图和练习本教学流程二次备课一、复习准备，导出新知。1、口算：523523694733 362037+4865+34 2、笔算：求与的和。师：笔算进位加法要注意什么呢？相同数位对齐，从个位加起,个位相加满十要向前一位进一。二、学习新课文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1 1、导入新课。板书课题：三位数不连续进位加 2、教学例 1。a.学生尝试求得271+122的结果(允许有各种方法。)小组合作讨论喜欢哪种方法，引导研究课本中的方法。提问：竖式应该怎样写？从哪一位加起？从个位加起。那么竖式中个位相加的得数怎样写呢？b.小结。列竖式计算。c.学生自由书写竖式，独立完成计算。两个学生板演，其余同学在书上完成。d.讲评：同桌口述并检查，在进位时“1”写的位置对不对，做进位加法时，是否漏写1 或忘加 1。3、自学例 2,讨论:十位上 3+7=10,怎样写?4、想一想:271+903,怎样计算?5、计算万以内的加法要注意什么?三、稳固练习1、直接在书上计算第37 页的做一做，指明学生板演，集体讲评。2、引导完成练习八第1、2、3 题四、全课总结。这节课你认为自己表现得如何，你有什么收获？板书设计文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1课后反思课题：三位数加三位数(连续进位加)教学内容例 3 单 元第几课时第 2 课时教学目标知识与技能在掌握三位数不连续进位加法的基础上进一步学习三位数的连续进位加法。过程与方法提高学生计算的速度和准确性。情感态度与价值观在合作学习中增强对数学学习的兴趣。课的类型新授课学情分析学生已掌握三位数加三位数的方法教学重、难点教学重点：能应用法则准确地计算三位数连续进位的加法题。教学难点：哪一位上的数相加满十，要向前一位进1，而且在前一位上的数相加时，要记得加上进上来的1。教法、学法先学后教教学准备及用具练习本教学流程二次备课一、复习准备，导出新知。1、列竖式计算:365+43 201+594 649+326 问：谁还记得三位数不连续进位加法列竖式时要注意些什么？你注意到了吗？文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1 2、口算:600+800=900+100=1000+100=3、估算:599+800 900+101 989+112问：不用笔算，你能很快地算出大概的答案吗？你是怎么想的？二、学习新课 1、出例如 3 师：该怎样计算?2、四人小组讨论，要求每人都要发表自己的意见和方法。3、笔算师：请同学们列竖式计算 (指明学生板演，集体讲评。)4、还可用什么方法计算?(298 接近 300,可看作 300 来计算。)5、算得对不对呢?你会验算吗?6、你是怎样验算的?三、稳固发展 1、师：请同学们打开课本38 页，做一做直接写在书上,想一想是否有进位,再计算并验算 2、练习八第 4、5、6 学生独立完成。四、全课总结。这节课你认为自己表现得如何，你有什么收获?板书设计课后反思文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1课题：连续进位加练习课教学内容练习八单 元第几课时第 3 课时教学目标知识与技能通过练习，使学生进一步掌握万以内笔算加法的计算法则，并能应用法则准确地计算。过程与方法提高学生计算的速度和准确性。情感态度与价值观通过练习，学会用知识间的内在联系整理知识的学习方法，训练学生主动探究、大胆想象、合作交流。课的类型练习课学情分析学生已掌握三位数的连续进位加法。教学重、难点教学重点：掌握万以内笔算加法的计算法则，并能应用法则准确地计算。教学难点：训练学生主动探究、大胆想象、合作交流。教法、学法练习为主教学准备及用具练习本教学流程二次备课一、设置情境、揭示内容。师：海上有许多的帆船，每艘帆船上都装有两箱物品，要知道船上一共装有多少物品应该怎么办呢？把两箱物品加起来在没有准确计算船上的物品数目之前你能不能大概地说出哪艘船载的东西最多？哪艘船载的东西最少呢？你是怎么看出来的，能不能将你的想法告诉大家？师：请你动手列竖式算一算，这六艘船的排列顺序是不是和你估计的一样？文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1二、开锁游戏。锁头上有得数，钥匙上有算式，请将算式和相应的得数连起来。三、下面哪两个数加起来得？说说你是怎么想的？四、买东西1、买一个地球仪和一个书包共需要多少钱?2、你想买什么?要花多少钱?3、和同桌互相提一个数学问题并解答五、小君可以怎么走？走哪条路最近？共同分析 40 页第题。六、课本 40 页第 10 题。只用数字 8 组成五个数,填入下面的方框里,使等式成立。先学生试做,在交流七、全课总结。这节课你认为自己表现得如何，你有什么收获?板书设计:连 续 进 位 加相同数位对齐，从个位加起。哪一位上的数相加满十，要向前一位进，在计算到前一位的时候不能忘记加进位。课题：减法(连续退位)文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1教学内容例 1、2 单 元第几课时第 4 课时教学目标知识与技能使学生较透彻地理解笔算减法的计算法则,并能应用法则准确地计算连续退位的减法题。过程与方法会解答有关的应用题。情感态度与价值观培养良好的学习习惯。课的类型新授课学情分析学生已学会两位数的减法教学重、难点教学重点：能应用法则准确地计算连续退位的减法题。教学难点：哪一位上的数相减不够时，要从前一位退1，而且在前一位上的数相减时，要记得减去退去的1。教法、学法先学后教教学准备及用具练习本教学流程二次备课一、复习 1、口算：70-26 65-1562-1885-56 2、笔算：440-150600-240提问：笔算减法要注意什么？二、新授 1、教学例 1 师：同学们都喜欢看动画片,下面是国产电视动画片生产情况统计表。问：你从书上观察到了什么线索？师：请你们观察 41 页的图,你能提出什么数学问题?出例如 1 文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文档编码:CN9M7H2G8H5 HF9L2I6P6H9 ZQ6V2D5J5F1文