人教版小学一年级数学认识时间1.ppt

1、认识时间,火车站,我应该什么时候去火车站坐火车呢？,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,

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

3、7,5,10,15,20,25,30,35,40,45,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,45,50,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,45,50,55,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,45,50,55,60,11,12,10,1,2,3,4,5,6,9,8,7,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,

4、1,2,3,4,5,6,9,8,7,5,10,15,20,12：20,12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,12,1,2,3,4,5,6,7,8,9,10,11,1分钟你又能做什么？,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,请你思考,7：00后5分是（ ），前5分是（ ）。,8：30再过5分是（