2022年100以内数的认识教学设计2 .pdf

学习必备欢迎下载数数数的组成张家庄小学张彦立教学目标：使学生认识计数单位“一”和“十”，知道10 个一是十，10 个十是一百，知道100 以内数的顺序，掌握100以内数的组成能够熟练地一个一个和十个十个地数出数量在100以内物体的个数教学重点：100 以内数的组成教学难点：接近整十数时数数的方法教具学具准备：100 根小棒、橡皮筋、课件。教学过程：一、激趣导入，引发兴趣。师：老师想考大家几个问题，小朋友们想不想回答？第一个问题：你家有几口人？（学生自由抢答）第二个问题：谁知道咱们班总共有多少位同学？（学生打手势回答）第三个问题：（课件出示百羊图）学习必备欢迎下载这些羊大概有多少只呢？大家交流，说一说自己估计的结果。师：我们的估计对吗？可以数。你会数吗？今天学习数数，数的组成。二、操作、交流，学习数100 以内各数。1实物数数。（1）师：老师为每个小组准备了一捆小棒，它的数量和小羊的只数一样，数一数小棒有几根，就知道小羊有几只。四人小组一起数小棒，互相帮助，说一说怎样数。（2）四人小组数数活动汇报，你是怎么数的？（有多种数法，可以指名进行实际操作。）小朋友们的方法很多，哪一种方法更简单呢？（学生说一说）谁愿意用小棒再来演示，让全班都能看清楚？2、讨论。师：过去，我们知道10 个一是一十，从刚才的数，我们又知道了什么？学生 4 人小组讨论，讨论后找代表发表意见。3引导学生一十一十地数到一百。（1）师：数 100 以内的数，可以一个一个地数，从一数到一百，也可以十个十个地数，数了10 个十就是一百。学生数 10 捆小棒：一十、二十、三十九十、一百。文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 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ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5学习必备欢迎下载（2）数百羊图。一只一只地数，再十只十只地数。（同桌一个人数另一个人检查）（3）抢答：一十一十地数，三十前面是（）十，三十后面是（）十。八十前面是（）十，八十后面是（）十。（4）指名数：一十一十地数，从一十数到一百，从三十数到七十。三、接近整十数的数法1师：拿 35 根小棒，你怎么拿？（摆好小棒3 捆和 5 个单根）出示例 2：从三十五数到四十二。交流：三十九后面的数是多少？为什么是40？学生将 10 个单根捆成一捆，得4 捆，再接着数到四十二。2从五十六数到六十三，再从六十三数到七十二。3、脱离实物数数从八十八数到一百尝试练习：从五十七数到七十二从六十九数到八十一同桌互相数数，随便从一个数开始，接着往下数四、学习 100 以内数的组成。文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5学习必备欢迎下载教学例 31、先摆出 1 捆零 5 根小棒，请学生说出数的组成，再添上 2 捆小棒，你能说出数的组成吗？2、第 33 页下面的“做一做”（1）看一看，想一想，再填一填。（2）全班订正。说一说是几个十和几个一，组成多少。五、巩固与发展1、数数接龙比赛。教师说一个数，学生分组以接力赛的方式每个人数一个数，数到教师说停时，数得最多的小组获胜。2、拍 3 游戏。教师先报一个数，以组为单位学生轮流站起来报数，报到含有 3 的数的学生不能说出这个数，只能用拍手来代替，反之则犯规。3、开火车。教师任意说出一个数，学生以开火车的形式报出后面紧接着的 5 个数。4、说说生活中100 以内的数文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5学习必备欢迎下载师：生活中哪些地方有100 以内的数？学生举例：公共汽车准乘人数、人民币、六、小结。本节课你学会了什么？读数写数张家庄小学张彦立一、教学内容：文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5学习必备欢迎下载人教版一年级下册34-35 页读数、写数。二、教学目标:1、能正确地读、写出100 以内的各数。.2、知道读数和写数都是从高位开始,并能知道数位的顺序,知道各个数位上的数表示的含义.3、通过读数和写数,进一步培养学生的数感.4、培养学生学习数学的兴趣.三、教学重点:任意两位数的读,写法.四、教学难点:由直观到抽象,读,写两位数.五、教学准备:计数器,小棒,卡片。六、教学过程:一、激趣引入师：今天老师刚刚收到了一封由信鸽带来的信。想知道里面写了什么吗？（学生齐声回答：想）那老师就找一位同学读一读。（抽签选择那位学生读）学生读信：同学们，你们好：我是大森林里的山羊老师，想邀请你们到我们的“森林王国”来做客，如果本节课谁得的小星星最多，你就是我们“森林王国”最尊贵的小客人。看下面的题谁能答对呢？1、56 是由（）个十和（）个一组成组成的。2 个十和 7 个一是（）。2、从三十八数到五十。文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5学习必备欢迎下载（抽签决定那一个小组回答问题，答对后奖励一颗小星星）二、合作探究1、师：山羊老师的第二封信到了，我们看看给我们写了什么？（读信方法同上）信的内容：同学们：你们刚才真棒！下面的考验更难了，你们还能行吗？2、教学例 4.（1）同桌两个人一组摆出24 根小棒，后师卡片出示24 根小棒（贴在黑板上）。同桌先互相说一说它的组成，然后想一想，2 捆（即 20 根）应摆放在计数器的那个数位上？4 根呢？（2）学生在计数器上拨珠表示24。边拨边叙述：2 个十在十位上拨 2 颗珠，4 个一在个位上拨4 颗珠。师出示计数器的卡片（贴在黑板上）学生订正自己的答案。（3）提问：“2 在哪个数位上？4 在哪个数位上？”（4）学生独自在练习本上写出写作和读作。师卡片出示写作和读作（贴在黑板上）写的又快又对的奖励一颗小星星。（5）教师谈话:刚才我们会读数了,现在你们能说一说是怎样读数的吗？指生答后教师小结：从左往右读，先读十位,再读个位数。十位上是几，就读几十；个位上是几，就读几，这个数读作二十四。文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5学习必备欢迎下载那怎样写数呢？要先写十位，再写个位。十位上是几，就写几；个位上是几，就写几这个数写作“24”。（6）学生再摆出42 根小棒，用同样的方法完成教学过程。当学生写出并（读出 42 以后，让学生对比24 与 42 中的“4”、“2”的意义，加深对不同数位上的数所表示的意义的理解。（7）学生再摆出30 根小棒，用同样的方法完成教学过程。提醒学生注意：当个位上一个也没有时，要用“0”占位。3、教学例 5：学生独立写出例5 中的数，写完后轻声读一读。教师将写得又整洁又美观的学生作业进行展示，奖励每人一颗小星星。4、教学例 6：（1）让学生利用计数器拨珠。先一个一个地拨，在个位上拨 9 颗珠后提问：“再拨上一颗是几颗？”“10 个一是多少？怎样用计数器上的珠子表示？”（2）在十位上，一个一个地拨，拨出9 颗后提问：“这9颗珠表示多少？”“再拨一颗表示几个十？”“10 个十怎样用计数器上的珠子表示？怎样读写？”（3）学生在课本上尝试写出一百，并读一读，提醒学生不要把个位,十位上的 0 丢了.写得又快又对前三名学生每人一颗小星星。文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 ZC9T7M9P2G5文档编码:CN3K1W9E4B3 HY5T1H1X4Q9 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