小学数学人教2011课标版二年级认识时间 (8).ppt

认识时间,二年级上册,你能说出钟面上的时间吗？,3,3：00,（）时,分针,时针,12,3,4：00,（）时,4,（）时,8,8：00,分针,时针,3,4,5,6,7,8,9,10,11,12,2,钟面上有（）个大格,12,1,2,3,4,5,7,6,8,11,12,10,9,5,10,15,(),1,2,3,4,(),每个大格里有（）个小格,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,每个大格里有（5）个小格,一共有（60）个小格,11,12,10,1,2,3,4,5,6,9,8,7,钟面上有12个大格,有60个小格,11,12,10,1,2,3,4,5,6,9,8,7,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。,11,12,10,1,2,3,4,5,6,9,8,7,5,分针走1大格是5分。,11,12,10,1,2,3,4,5,6,9,8,7,5,10,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,5,10,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,45,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,45,50,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,45,50,55,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,45,50,55,60,1,2,3,4,5,7,6,8,11,12,10,9,1时=60分,分针走一圈，时针走一个大格。1时60分,=,11,12,10,1,2,3,4,5,6,9,8,7,5,4时,4：05,5分,11,12,10,1,2,3,4,5,6,9,8,7,5,4：15,10,15,11,12,10,1,2,3,4,5,6,9,8,7,5,4：30,10,30,20,25,15,4时半,11,12,10,1,2,3,4,5,6,9,8,7,5,4：45,10,30,20,25,15,35,40,45,11,12,10,1,2,3,4,5,6,9,8,7,4：55,30,35,40,45,50,55,11,12,10,1,2,3,4,5,6,9,8,7,5：00,30,45,15,谁最棒？,715,120,52