二年级上册第7单元《认识时间》.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,执教教师：甘霖,欢迎指导,珠晖区英发小学,欢迎来到,钟表王国,。,钟面上有什么？,1,2,3,4,5,7,6,8,11,12,10,9,又粗又短是,时针,。,又细又长是,分针,。,8,时,8:00,早餐时间,小朋友们，你们会读下面的时间吗？,先看,时针指着,8,再看,分针指着,12,就是,8,时,。,12,时,12:00,中餐时间,小朋友们，你们会读下面的时间吗？,先看,时针指着,12,再看,分针指着,12,，就是,12,时。,先看,时针指着,几,再看,分针指着,12,，就是几时。,认识时间,1,2,3,4,5,7,6,8,11,12,10,9,钟面上有（）个大格。,12,观察钟面,1,2,3,4,5,7,6,8,11,12,10,9,5,10,15,(),(),每个大格里有（）个小格,钟面上一共有（）个小格,5,1,2,3,4,5,1,2,3,4,5,7,6,8,11,12,10,9,5,10,25,30,20,15,60,35,40,45,50,55,钟面上一共有（）个小格,60,1,2,3,4,5,7,6,8,11,12,10,9,分针走,1,小格,是,_,分钟。,1,1,2,3,4,5,7,6,8,11,12,10,9,5,分针走,1,大格,是,_,分钟。,5,男女,PK,赛,我问你答,1,2,3,4,5,7,6,8,11,12,10,9,时针走,1,大格,是,_,时。,1,1,2,3,4,5,7,6,8,11,12,10,9,1,大格,分钟走,1,圈，,时针走,。,分针走一圈，时针走一个大格。,=,60,分,1,时,12,60,1,1,5,1,60,1,、钟面上有,个大格，,个小格。,2,、时针走,1,个大格是,时。,3,、分针走,1,个小格是,分，走,1,大格是,分。,4,、时针走,1,个大格，分针正好走,圈，是,分。,我会填,4,时,5,分,先看,_,，再看,_.,就是,4,时,5,分,。,4,：,0,5,时针,分针,时针,过了,4,，,分针从,12,起走了,5,个小格，,4,时,30,分,先看,_,，再看,_.,就是,4,时,30,分,。,4,：,30,时针,分针,时针,过了,4,，,分针从,12,起走了,30,个小格，,4,时,半,4,时,45,分,先看,_,，再看,_.,就是,4,时,45,分,。,4,：,45,时针,分针,时针,过了,4,，,分针从,12,起走了,45,个小格，,1:25,1,时,25,分,8:05,8,时,5,分,6:50,6,时,50,分,1,2,3,认一认,先看,时针过了几就是几时，,再看,分针从,12,起走了几格就是几分，,钟面上的时间就是几时几分。,如何读时间,12,1,2,3,4,5,6,7,8,9,10,11,一分钟有多长？,点钞机,1,分钟,能点,1500,张人民币。,播音员,1,分钟播,180,个字。,请珍惜每一分钟，,让生命更有价值！,家庭作业,1,、完成数学书第,91,页的做一做。,2,、你认识秒针吗？秒和分有什么关系？,和爸爸妈妈一起观察吧。,再见,小红的一天,9,时,30,分,9,：,30,6,时,40,分,6,：,40,8,时,35,分,8,：,35,小红,起床,学习,看电视,睡觉,