人教版小学二年级数学上册数学《认识时间》ppt课件.ppt
2023/3/26,认识时间,2023/3/26,分针,时针,2023/3/26,6时,9时,12时,整时,2023/3/26,2时半,8时半,半时,2023/3/26,2023/3/26,火车站,我应该什么时候去火车站坐火车呢?,2023/3/26,2023/3/26,第一关,认识钟面,2023/3/26,1,2,3,4,5,7,6,8,11,12,10,9,2023/3/26,1,2,3,4,5,7,6,8,11,12,10,9,5,10,15,2023/3/26,1,2,3,4,5,7,6,8,11,12,10,9,5,10,25,30,20,15,60,35,40,45,50,55,2023/3/26,钟面上一共有60个小格。,1,2,3,4,5,7,6,8,11,12,10,9,5,10,25,30,20,15,60,35,40,45,50,55,2023/3/26,钟面上一共有()个大格,每大格里有()个小格,一共有()个小格。,12,5,60,2023/3/26,你们过关了!,恭喜恭喜,2023/3/26,第2关,认识时、分,2023/3/26,1,2,3,4,5,6,7,8,9,10,11,12,2023/3/26,1小时,时针走一大格,时间经过 1 小时。,2023/3/26,1,2,3,4,5,6,7,8,9,10,11,12,分针走一圈,时间经过 分。,60,分针走一小格,时间经过 1 分钟。,5分,10分,20分,45分,55分,60分,2023/3/26,1,2,3,4,5,6,7,8,9,10,11,12,2023/3/26,1,2,3,4,5,6,7,8,9,10,11,12,1时=60分,2023/3/26,一节课是()分,课间休息是()分,再加上()分,就是1小时。,40,10,10,体验一小时有多长,2023/3/26,一分钟有多长,2023/3/26,一分钟,一分钟可以生产600瓶可乐,银行点钞机点1500张人民币,中央电视台播音员播180个字,一分钟能生产2台彩电,一分钟能生产1600支铅笔,一分钟能做些什么呢?,2023/3/26,你们过关了!,贺喜贺喜,2023/3/26,第3关,认识几时几分,2023/3/26,1,2,3,4,5,6,7,8,9,10,11,12,9时,9:00,2023/3/26,1,2,3,4,5,6,7,8,9,10,11,12,9时5分,9:05,2023/3/26,2023/3/26,1.说出钟面所表示的时刻。,2.你是怎么知道的?,930,640,835,705,9时30分,7时5分,8时35分,6时40分,2023/3/26,谁最棒?,2023/3/26,715,525,2023/3/26,855,1045,2023/3/26,你们又过关了!,太棒了,2023/3/26,第四关,拨时游戏,2023/3/26,1、动手操作。在你的钟面上拨出6时25分。,2023/3/26,2、小组合作。1人说时间,1人拨时间。,2023/3/26,3、自主探究。拨一个自己喜欢的时间,并说说你在这个时间干什么?,2023/3/26,棒极了!聪明的小朋友都过关啦!,2023/3/26,下,课,