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,1,苏教版二年级数学下册认识时、分ppt课件,2,分针指着,12,，时针指着几就是几时。,3时,10时,12时,分针指着12，时针指着几就是几时。3时10时12时,3,1,2,3,4,5,7,6,8,11,12,10,9,分针（长针）,时针（短针）,7时,7:00,123457681112109分针（长针）时针（短针）7时7,4,钟面上有什么？,1.指针：长的是,分针,，短的是,时针,2.有12个数字（有12大格）,3.每个大格有,5小格,，有,60个小格,钟面上有什么？1.指针：长的是分针，短的是时针2.有12,5,1,2,3,4,5,7,6,8,11,12,10,9,1,12,5小格,1234576811121091125小格,6,1,2,3,4,5,7,6,8,11,12,10,9,5,10,25,30,20,15,60,35,40,45,50,55,钟面上有60个小格,123457681112109510253020156035,7,1,2,3,4,5,7,6,8,11,12,10,9,12到4有（）小格,20,1,2,3,4,5,7,6,8,11,12,10,9,12到9有（）小格,20,45,45,12345768111210912到4有（）小格 20,8,20,1,2,3,4,5,8,11,10,9,12,6,7,1分,分针走1小格是1分,201234581110912671分分针走1小格是1分,9,1,2,3,4,5,8,11,10,9,12,6,7,1分,分针走 1小格 是1分,20分,15分,10分,5分,1234581110912671分分针走 1小格 是1分,10,1,2,3,4,5,7,6,8,11,12,10,9,12到6有（）小格,就是（）分,30,30,30,30分,也可说是,半小时,12345768111210912到6有（）小格303,11,1,2,3,4,5,7,6,8,11,12,10,9,12到11有（）小格,就是（）分,55,55,55,12345768111210912到11有（）小格55,12,1,2,3,4,5,8,11,10,9,12,6,7,1时=（,60,）分,1234581110912671时=（60 ）分,13,1,2,3,4,5,7,6,8,11,12,10,9,分针12到12有（）小格，就是 （）分,60,60,60,1时=（）分,60,123457681112109分针12到12有（）小格,14,1,2,3,4,5,7,6,8,11,12,10,9,1,2,3,4,5,7,6,8,11,12,10,9,比较这两个钟面，有什么不同？,123457681112109123457681112109,15,1,2,3,4,5,7,6,8,11,12,10,9,1,2,3,4,5,7,6,8,11,12,10,9,8时,8时,时针指着,几,就是,几,时，如果在两个数之间，就,取小,的数字,123457681112109123457681112109,16,1,2,3,4,5,7,6,8,11,12,10,9,时针,走过数字8,8时,分针,走了20小格,20分,123457681112109时针8时分针20分,17,10时35分,10:35,1,2,3,4,5,6,8,11,12,10,9,7,时针走过数字几,分针走过几个小格,10时,35分,10时35分10:35123456811121097时针走过,18,1,2,3,4,5,7,6,8,11,12,10,9,7时半,7:30,7时30分,1234576811121097时半7:307时30分,19,1,2,3,4,5,7,6,8,11,12,10,9,7时25分,7:25,先看,时针,，,时针,走过,几,就是,几时,，,再看,分针,，,分针,走了,几小格,就是,几分,1234576811121097时25分7:25先看时针，时,20,苏教版二年级数学下册认识时、分ppt课件,21,1,2,3,4,5,7,6,8,11,12,10,9,1,2,3,4,5,7,6,8,11,12,10,9,时针走过数字几,分针走过几个小格,7时55分,7:55,123457681112109123457681112109,22,1,2,3,4,5,7,6,8,11,12,10,9,10时5分,10:05,12345768111210910时5分10:05,23,分针从“12”走到“1”，是（）分，,从“12”走到“7”，是（）分。,时针走（）大格，分针正好走,（）圈，1小时=（）分,5,35,1,1,60,5351160,24,5时25分,5:25,10时5分,10:05,6时50分,6:50,5时25分5:2510时5分10:056时50分6:50,25,