认识时间ppt.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,认识时间,康田小学 周全民,一、创设情境，引出时间问题,问题：钟表上现在是什么时间？,钟面上,一共有（,）大格,1,大格有（,）小格,一共有（,）小格,1,2,3,4,5,7,6,8,11,12,10,9,钟面上,一共有（,）大格,1,大格有（,）小格,一共有（,）小格,1,2,3,4,5,7,6,8,11,12,10,9,12,1,2,3,4,5,7,6,8,11,12,10,9,(,),(,),5,10,15,1,2,3,4,5,7,6,8,11,12,10,9,5,10,25,30,20,15,60,35,40,45,50,55,钟面上,一共有（,）大格,1,大格有（,）小格,一共有（,）小格,1,2,3,4,5,7,6,8,11,12,10,9,12,60,1,2,3,4,5,7,6,8,11,12,10,9,1,时,=60,分,1,2,3,4,5,7,6,8,11,12,10,9,1,时,=60,分,1,2,3,4,5,7,6,8,11,12,10,9,1,2,3,4,5,7,6,8,11,12,10,9,5,1,2,3,4,5,7,6,8,11,12,10,9,5,10,15,20,25,30,35,40,45,50,55,11,12,10,1,3,4,5,6,9,8,7,5,9,时,5,分,9:05,9,时,15,分,9,：,15,11,时,55,分,11,：,55,1:25,1时25分,8:05,8时5分,6:50,6时50分,认一认,考考你,相信你一定行,!,3,：,10,7,：,15,1,：,20,2,：,40,10,：,45,5,：,25,6,：,50,8,：,55,9,时,30,分,9,：,30,6,时,40,分,6,：,40,8,时,35,分,8,：,35,二、体会刻度与时针、分针的关系,（一）认识钟面,问题,1,：关于钟面你们都知道哪些知识？,问题,2,：你还有其他发现吗？,填一填,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。,12,60,1,1,5,1,60,分针走一圈，时针走一个大格。,1,时=,60,分,二、体会刻度与时针、分针的关系,（一）认识钟面,问题,1,：关于钟面你们都知道哪些知识？,问题,2,：你还有其他发现吗？,二、体会刻度与时针、分针的关系,（二）体会刻度与时针、分针的关系,问题,1,：仔细观察，分针走了几个小格？,二、体会刻度与时针、分针的关系,问题,2,：你还能继续数下去吗？,10,20,25,30,35,40,45,50,55,60,（二）体会刻度与时针、分针的关系,问题,1,：仔细观察，分针走了几个小格？,（三）认识,1,时,60,分,二、体会刻度与时针、分针的关系,三、认识几时几分,四、应用拓展，巩固新知,做一做。,问题：你能准确写出每个钟表所表示的时间吗？,7:30,7:40,8:00,10:45,9:55,6:05,1:20,四、应用拓展，巩固新知,五、课堂作业,作业：,第,93,页练习二十三，第,1,题、第,2,题,。,