新人教版小学数学二年级上册第七单元认识几时几分(1)例1例2.ppt

猜谜语：,小小骏马不蹄，滴答滴答不息，告诉我们按时起。提醒人们争朝夕。,教学目标:,学会看钟表认识时间单位时和分，掌握它们之间的关系：1时=60分。2.体验时、分的实际意义，建立初步 的时间观念。3.正确地说出钟面上指示的时刻，并 能进行简单的时间计算。4.教育学生珍惜时间，养成守时间、珍惜时间的好习惯。,认识几时几分,分针,时针,7时,7:00,1,2,3,4,5,7,6,8,11,12,10,9,7时半,7:30,1,2,3,4,5,7,6,8,11,12,10,9,1,12,5小格,10,20,25,30,35,40,45,50,55,60,1,2,3,4,5,7,6,8,11,12,10,9,5,10,25,30,20,15,60,35,40,45,50,55,钟面上有60个小格,1,2,3,4,5,8,11,10,9,12,6,7,1,2,3,4,5,8,11,10,9,12,6,7,时针走（）大格，分针正好走（）圈，也就是（）个小格，1小时=（）分,12到4有（）小格,20,12到9有（）小格,20,45,45,1,2,3,4,5,7,6,8,11,12,10,9,1,2,3,4,5,7,6,8,11,12,10,9,比较这两个钟面，有什么不同？,时针走过数字8,8时,分针走了20小格,20分,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,1,2,3,4,5,7,6,8,11,12,10,9,7时25分,7:25,1,2,3,4,5,7,6,8,11,12,10,9,时针走过数字几,分针走过几个小格,1,2,3,4,5,7,6,8,11,12,10,9,1,2,3,4,5,7,6,8,11,12,10,9,7时半,7:30,7时30分,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,5,35,1,1,60,5时25分,5:25,10时5分,10:05,6时50分,6:50,20,1,2,3,4,5,8,11,10,9,12,6,7,1分,分针走1小格是1分,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,5,10,20,15,1,2,3,4,5,8,11,10,9,12,6,7,（1）时针从8走到9，经过1时。（）,（5）在钟面上分针走1圈，时针走1个小格。（）,（4）在钟面上分针走1圈，时针 走1个大格，是1小时。（）,（3）分针从8走到9，经过5时。（）,（2）分针从8走到9，经过1分。（）,正确的画“”，错误的画“”。,