资源描述
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,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,*,认识时分,认识时分,猜谜语,有家兄弟真奇怪，,一天到晚转圈圈。,不吃饭来，不休眠,.,丁俊伟,猜谜语有家兄弟真奇怪，丁俊伟,形形色色的的钟表,形形色色的的钟表,问题：钟表上现在是什么时间？,一、创设情境，引出时间问题,问题：钟表上现在是什么时间？一、创设情境，引出时间问题,二、体会刻度与时针、分针的关系,（一）认识钟面,关于钟面你们都知道哪些知识？,二、体会刻度与时针、分针的关系（一）认识钟面关于钟面你们都知,10,1,2,3,4,5,7,6,8,11,12,10,9,1,大格,1,小格,5,15,20,25,30,35,40,45,50,55,60,101234576811121091大格1小格5152025,钟面上有（）个大格。,每个大格中有（）个小格。,一共有（）个小格。,12,5,60,钟面上有（）个大格。12560,二年级数学认识时分优质课公开课教学ppt课件获奖,仔细观察，分针走了几个小格？,分针走,1,小格是,1,分，走几小格就是几分,仔细观察，分针走了几个小格？分针走1小格是1分，走几小格就是,1,2,3,4,5,7,6,8,11,12,10,9,1,分,1234576811121091分,1,2,3,4,5,7,6,8,11,12,10,9,123457681112109,我知道了：分针从12起，走到1是5分，,走到2是10分，走到3是,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,我知道了：分针从12起，走到1是5分，二、体会刻度与时针、分,1,2,3,4,5,7,6,8,11,12,10,9,5,学会用,5,的口诀数几分,1234576811121095学会用5的口诀数几分,1,2,3,4,5,7,6,8,11,12,10,9,5,10,123457681112109510,1,2,3,4,5,7,6,8,11,12,10,9,5,10,15,12345768111210951015,1,2,3,4,5,7,6,8,11,12,10,9,5,10,15,20,1234576811121095101520,1,2,3,4,5,7,6,8,11,12,10,9,5,10,15,20,25,123457681112109510152025,1,2,3,4,5,7,6,8,11,12,10,9,5,10,15,20,25,30,12345768111210951015202530,1,2,3,4,5,7,6,8,11,12,10,9,5,10,15,20,25,30,35,1234576811121095101520253035,1,2,3,4,5,7,6,8,11,12,10,9,5,10,15,20,25,30,35,40,123457681112109510152025303540,1,2,3,4,5,7,6,8,11,12,10,9,5,10,15,20,25,30,35,40,45,123457681112109510152025303540,1,2,3,4,5,7,6,8,11,12,10,9,5,10,15,20,25,30,35,40,45,50,123457681112109510152025303540,1,2,3,4,5,7,6,8,11,12,10,9,5,10,15,20,25,30,35,40,45,50,55,123457681112109510152025303540,1,2,3,4,5,7,6,8,11,12,10,9,5,10,15,20,25,30,35,40,45,50,55,60,123457681112109510152025303540,1,2,3,4,5,7,6,8,11,12,10,9,123457681112109,1,2,3,4,5,7,6,8,11,12,10,9,1,时,1234576811121091时,12,7,8,9,10,11,1,2,3,4,5,6,时针走一大格是一小时,127891011123456时针走一大格是一小时,分针走60小格，时针有什么变化呢？,分针走60小格，时针有什么变化呢？,1,2,3,4,5,7,6,8,11,12,10,9,分针在走，时针也同时在走,1,时,=,？分,123457681112109分针在走，时针也同时在走1时=,1,时,=60,分,1,时,60,分,此时，时针走了,1,大格,分针走了,60,小格，,1时=60分1时60分此时，时针走了1大格分针走了60小格,时针走个大格，分针正好走,3.,圈，,是 分。,1,60,1.,时针走个大格是,分针走个小格是,走大格是 分。,时。,2.,分，,1,1,5,填一填,圈，是 分。1601.时针走个大格是分针走个,1,2,3,4,5,7,6,8,11,12,10,9,学会认几时几分,先认几时，,再认几分,123457681112109学会认几时几分先认几时，,三、拨时游戏,三、拨时游戏,11,12,10,1,3,4,5,6,9,8,7,2,从四时开始数。,11121013456987 2,11,12,10,1,3,4,5,6,9,8,7,2,从四时开始数。,4时,5,分,4,:05,11121013456987 2,11,12,10,1,3,4,5,6,9,8,7,2,从四时开始数。,4时30分或4时半,4,:,30,11121013456987 2,11,12,10,1,3,4,5,6,9,8,7,2,从四时开始数。,4时4,5,分,4,:,4,5,11121013456987 2,四、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，巩固新知做一做。问题：你能准确写出每个钟表所表,小朋友们，今天你学会了什么？,小朋友们，今天你学会了什么？,圆圆一大家，,兄弟,12,个，,各有,5,个小宝宝，,60,宝宝手牵手,，亲亲密密围成圆；,时针爸爸短又粗，懒懒洋洋走大格，一走就是,1,小时；,分针妈妈细又长，不急不慢走大格，一走就是,5,分钟；,瞧这一大家，报时可是全靠他。,（,12,个大格）,（,1,大格,=5,小格）,（一圈,60,小格）,（,1,大格是,1,小时）,（,1,小格是,1,分钟，,1,大格是,5,分钟）,圆圆一大家，（12个大格）（1大格=5小格）（一圈60小格）,认几时几分,先认几时，再认几分。,时针走过几就是几时，,分针指着几就是几个五分,认几时几分先认几时，再认几分。,亲爱的孩子们,:,时针、分针、秒针不停地转动，时间也就悄悄地溜走了，而且再也回不来了。因此，我们从小就要做一个会安排时间并且珍惜时间的好孩子。,亲爱的孩子们:,惜时名言,一寸光阴一寸金,寸金难买寸光阴。,惜时名言一寸光阴一寸金,谢谢指导！,谢谢指导！,
展开阅读全文