人教版二年级上册数学认识时间(第一课时)优质ppt课件.ppt

认识时间,第一课时,二年级数学下册第二单元,这是什么？,有个东西三条腿儿，日夜奔跑不怕累，嘀嗒嘀嗒提醒你，时间一定要珍惜。,钟面上都有什么？,大格,数字,小格,时针,分针,秒针,复习,复习,3时,3:00,复习,3:30,3时30分,复习,1,上课。,1,2,3,4,5,7,6,8,11,12,10,9,12,认识钟面,认识钟面,1,2,3,4,5,7,6,8,11,12,10,9,(),(),5,10,15,认识钟面,1,2,3,4,5,7,6,8,11,12,10,9,5,10,25,30,20,15,60,35,40,45,50,55,12,60,5,认识钟面,1,2,3,4,5,6,8,11,10,9,12,7,认识时,1,2,3,4,5,6,8,11,10,9,12,7,认识分,认识分,1,2,3,4,5,6,8,11,10,9,12,1,2,3,4,5,5,10,15,20,25,30,35,40,45,50,60,55,7,认识分,1,2,3,4,5,6,8,11,10,9,12,1分,7,5分,10分,15分,20分,25分,30分,35分,40分,45分,50分,60分,55分,1,2,3,4,5,6,7,8,11,10,9,5分,15分,25分,45分,12,55分,认识分,时分的关系,1,2,3,4,5,7,6,8,11,12,10,9,时分的关系,时针走了1大格,分针走了1大圈,1时,寻找时针、分针运动的秘密：,60分,=,时间的认识与书写,几时,几分,时,分,8,15,:,8,15,5分,10分,15分,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,时间的认识与书写,时 分,:,6,25,6,25,时间的认识与书写,时 分:,9,15,9,15,时间的认识与书写,11时55分11:55,11,12,10,1,3,4,5,6,9,8,7,5,9时 5分,9:05,时间的认识与书写,做一做,相信你一定行!P82,3:10,7:15,1:20,2:40,10:45,5:25,6:50,8:55,1.,7 时 5 分,7:5,9 时 30 分,9:30,6 时 40 分,6:40,8 时 35 分,8:35,7:05,P83 练习十五,一节课是（）分钟，,40,10,10,课间休息（）分钟，,再加上（）分钟是1小时。,钟面上有,个大格，,个小格。,时针走个大格是,分针走个小格是,时针走个大格，分针正好走,走大格是,时。,分，,圈，,分。,是,分。,1时=60分,12,60,1,1,5,1,60,你学到了什么？,播放一集动画片的时间是分钟，如果能连续播放小时，就可以看（）集了。,6,填一填：在括号里填上合适的时间单位。,1、夏天午睡大约1（）。,2、小文吃饭大约用25（）。,3、做一套广播操大约用5（）。,4、乘公共汽车从扬州到常州恐龙园大约2（）。,小时,分钟,分钟,小时,