人教版小学一年级数学认识时间1.ppt

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1、认识时间,1时1：00,6时6：00,1时,4时,6时,9时,1.说出钟面所表示的 时间。,2.你是怎么知道的？,分针,时针,3,4,5,6,7,8,9,10,11,12,2,11,12,10,1,2,3,4,5,6,9,8,7,数一数,一共有60个小格子。,11,12,10,1,2,3,4,5,6,9,8,7,我们知道时针走1大格是1小时。,11,12,10,1,2,3,4,5,6,9,8,7,1,分针走1小格是1分。,一分钟有多长,11,12,10,1,2,3,4,5,6,9,8,7,5,分针走1大格是5分。,11,12,10,1,2,3,4,5,6,9,8,7,5,10,11,12,10

2、,1,2,3,4,5,6,9,8,7,5,10,15,5,10,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,4

3、0,45,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,45,50,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,45,50,55,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,45,50,55,60,11,12,10,1,2,3,4,5,6,9,8,7,时与分的关系：,11,12,10,1,2,3,4,5,6,9,8,7,分针走一圈，时针走一个大格。1时 60分,=,11,12,10,1,2,3,4,5,6,9,8,7,5,10,1

4、5,20,12：20,12时20分,我来教你认时间。,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,12：35,12时35分,我也来教你认一认,9时15分9：15,11时55分11：55,1.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,谁最棒？,715,120,525,855,1045,12,1,2,3,4,5,6,7,8,9,10,11,1分钟你又能做什么？,拔一拔,请你思考,7：00后5分是（），前5分是（）。,8：30再过5分是（），再早5分是（）,7：05,6：55,8：35,8：25,请珍惜每一分，让生命更有价值！,同学们再见！,