2022年人教版小学数学四年级上册第四单元教案 .pdf
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1、名师精编优秀教案第 7 册数学学科第 四单元 三位数乘两位数(中间末尾没有0教学设计总 第22 课 时主 备 教 师白小籽授课时间10.20课型新授课执教教师教学目标知识与技能:使学生掌握三位数乘两位数的笔算方法。培养学生类推迁移的能力和口算的能力。过程与方法:使学生在小组内经历笔算乘法计算的全过程,掌握算理和计算的方法。情感、态度和价值观:让每一个学生在合作学习、汇报展示、课堂互动交流中体验到学习带来的喜悦,培养学生认真计算的良好学习习惯。教学重点使学生掌握三位数乘两位数的计算方法。教学难点使学生掌握三位数乘两位数的计算方法并正确计算。教学方法教学过程师生双边活动媒体资料一、复习引入(课件出
2、示新设计的口算)1.口算352=183=2503=2.估算195 21 7 398 23.24 12=从刚才的计算中,你还记得两位数乘两位数的计算方法吗?两位数乘两位数的计算方法:(1)先用第二个因数个位上的数去乘第一个因数,得数的末位和因数的个位对齐;(2)再用第二个因数十位上的数去乘第一个因数,得数的末位和因数的十位对齐;(3)最后把两次乘的积加起来。图片 1 图片 2 名师精编优秀教案第 7 册 数学学科 四单元三位数乘两位数(中间末尾没有0教学设计教学过程师生双边活动媒体资料4.引入我们已经学习了两位数乘两位数,这节课我们继续学习三位数乘两位数。(板书并出示课时目标)二、新授1.情景导
3、入同学有没有看过火车呢?那你们有没有坐过火车啊?李叔叔要坐火车去北京,但是他遇到了一个问题,我们一起来帮帮他好不好?2.教学例 1 李叔叔从某城市乘火车去北京用了12 小时,火车每小时行145千米。某城市到北京有多少千米?(1)理解题意:每小时145千米,用了 12小时图片 3 图片 4 文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA
4、7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码
5、:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10
6、 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9
7、ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档
8、编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F
9、10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W
10、9 ZA7T8A5I2T3名师精编优秀教案(2)题析并列出算式:145 12=(千米)(3)估算估算一:把 145看成 150,把 12 看成 10,15010 得 1500 估算二:把 12 看成 10,14510=1450(4)探索计算方法先独立计算,再在小组交流算法,最后全班共享。可能出现:A.口算:先算 10 小时:14510=1450(千米),再算 2 小时:1452=290(千米),加在一起:1450+290=1740(千米)B.口算:14512=14543=5803=1740(千米)第 7 册数学学科第四单元三位数乘两位数(中间末尾没有0教学设计教学过程师生双边活动媒体资料C.竖
11、式计算 1 4 5 1 2 2 9 0 2 乘 145 的积 1 4 5 10乘 145的积 1 7 4 0(5)讨论归纳讨论:在这么多的算法中,你最喜欢哪种方法?归纳:三位数乘两位数的计算法则:1.先用第二个因数个位上的数去乘第一个因数,得数的末位和因数的个位对齐。2.再用第二个因数十位上的数去乘第一个因数,得数的末图片 5文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y
12、4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M
13、7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2
14、T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L
15、2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S
16、1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5
17、I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H
18、2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3名师精编优秀教案位和因数的十位对齐。3.然后把两次乘得的积加起来。三、巩固新知1、基础练习:13423 1.数学医院(1)13416 157 34(2)23434(3)16326 3、13412 17647 42536 23782 4.不用计算,判断对错(1)15828=4536()(2)23142=7702()四、课堂小结通过这节课的学习,你有哪些收获?第册学科第单元教学设计教学过程师生双边活动媒体资料文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5
19、S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A
20、5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2
21、H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7
22、A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T
23、8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:C
24、E2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 H
25、L7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3名师精编优秀教案第册学科第单元教学设计教学过程师生双边活动媒体资料文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T3文档编码:CE2H2L2Y4F10 HL7A5S1M7W9 ZA7T8A5I2T
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