2021年北师大版小学数学三年级上册“乘火车”教案.pdf

课题：“乘火车”（两、三位数乘一位数（连续进位）的乘法）备课人：五里街道明德小学叶燕教学内容：北师大版小学数学三年级上册第56 和 57页。教学目标：1、探索并掌握两、三位数乘一位数连续进位的计算方法，并能正确地进行计算。2、结合具体情境，逐步培养学生发现问题、提出问题和解决问题的意识和能力。3、在解决简单问题过程中，感受数学与生活的密切联系，激发学习兴趣。教学重点：掌握两、三位数乘一位数连续进位的计算方法，并能正确计算。教学难点：理解两、三位数乘一位数连续进位的算理。教学过程：一、复习引入：1、复习：列竖式计算：（1）724（2）1185你能说说用竖式计算多位数乘一位数的计算法则吗？2、引入：引导学生看图，设问:（1）你发现了哪些数学信息？（2）根据这些数学信息，你能提出哪些数学问题？二、新授：出示问题：5 节卧铺厢可乘多少人？1、引导列式：724（人）2、探讨算法：|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 1 页，共 14 页3、汇报算法：（1）拆乘，（2）列表，（3）竖式4、评价算法：（突出竖式算法）设问：（1）个位上的 2 乘 5 和积满十，怎么办？（2510，表示一个十，在个位写0，向十位进一）（2）十位上的 7 乘 5，积满十，怎么办？（十位上的 7 表示 7 个十，乘 5 等于 35 个十，也就是 350，所以向百位进 3；余下来的 5 个十加上进上个位进上来的1 个十，得 6个十，所以十位上写6。）7 253605、尝试：683你会算吗？你为什么这样算？6、拓展应用：出示问题：7 节硬座车厢可乘多少人？（1）列式：1187（人）（2）竖式计算：1187826设问：个位上乘得的积是多少？该怎么办？为什么？十位上乘得的积是多少？为什么向百位进一？2510 50+1060 705350 1 3 5 1|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 2 页，共 14 页文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 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ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6积中十位上的 2 是怎样来的？百位上乘得的积是多少？为什么百位上写8。（3）尝试：36177、归纳法则：引导学生通过对上面四道算式的比较，分析、归纳、概括法则：两、三位数乘一位数连续进位的计算方法：从个位乘起，乘到哪一位，就把积的个位写在哪一位的下面；哪一位乘得的积满几十，就向前一位进几；要加上进位上来的数。三、巩固练习：1、下面算式哪些是对的，哪些是错的，错的请改正。1167712484162732429282、课本 57页的第 5 题，课后作业。四、教学反思：.|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 3 页，共 14 页文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 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ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6课题 0 5？备课人：五里街道明德小学叶燕教学内容：义务教育数学课程标准北师大版三年级上册60-61 页教学目标：知识技能：探索并掌握“0 和任何数相乘都等于0”这个规律。数学思考：结合具体的情境，能应用所学知识解决学习中的简单问题，逐步培养学生的应用的意识和能力。问题解决：探索并掌握一个因数中间或末尾有0 的计算方法，理解算理.情感目标:经历与他人交流各自算法的过程，使学生逐步学会合作学习。教学重点：探索并掌握“0 和任何数相乘都等于0”。教学难点：结合具体的情境，能应用所学知识解决学习中的简单问题，逐步培养学生的应用的意识和能力。教学设计：一、情境导入：同学们，你们知道“0”表示什么含义吗？0 加任何数都得几？任何数减 0 都得几？那么你们知道“？”吗？二、探索新知：|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 6 页，共 14 页文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V61、请学生独立思考，先自己算算结果。2、小组内交流各自的算法。3、谁能结合数学情境，说说你的算法？如：结合“5 个盘子中有几个苹果”这样的实际情境去理解为什么“05=0”4、汇报算法：（1）5 个 0 相加得 0。（2）3 5=15，2 5=10，1 5=5，0 5=0，5、算一算0 5=7 0=0 26=6、让学生任意出几道0 和任何数相乘的算式（包括“00”）7、试一试：（1）130 5=1 3 0 13 5=65 1 3 0 1 5 130 5=650 1 5 5 0 5 0（2）402 3=、400 3=1200，4 0 2 你发现了什么？|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 7 页，共 14 页文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V62 3=6，3 1200+6=1206。三、拓展应用1、连一连。240 2 302 5 15 3 25 4 204 2 320 5 150 3 250 4 2、小狗送信。（1）、小狗从邮局出发给狐狸送信，往返需要走多少米？（2）、小狗先给狐狸送信，再给松鼠送信，然后回到邮局。3、在里填上“”、“”或“=”.105 6 600 190 5 1000 180 4 800 140 7 980 4、100 23 3 14 6 28 75+25 4（34+56）7（20+80）3 20+80 3 四、课堂小结：在这节课中，我们发现了一个什么问题？板书设计0 5=？3 5=15 2 5=10，1 5=5，0 5=0，教学反思：|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 8 页，共 14 页文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A8K10V6文档编码:CR4O7U10M9N7 HC8H2T2Y9P7 ZK5Q7A