认识时间到24小时

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,*,认识时间,8,时,8,：,0,0,3,时,3,：,0,0,6,时,6,：,0,0,像这样，钟面上分针（长针）指着,12,，时针（短针）指着几，就是几时。,认一认,4,时,30,分,4:30,10,时,30,分,10:30,分针指着,6,，时针转过几，就是几时半,11,12,10,1,2,3,4,5,6,9,8,7,认一认,11,12,10,1,2,3,4,5,6,9,8,7,1,认一认,11,12,10,1,2,3,4,5,6,9,8,7,5,认一认,11,12,10,1,2,3,4,5,6,9,8,7,5,10,认一认,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,5,10,认一认,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,认一认,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,认一认,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,认一认,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,认一认,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,认一认,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,45,认一认,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,45,50,认一认,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,45,50,55,认一认,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,45,50,55,60,认一认,要认读出一个时刻，,要根据时针和分针的位,置来共同确定。先看时,针刚走过数几就是几时,多，再看分针从,12,起走,了几个小格就是几分，,这时钟面上的时刻就是,几时几分。,钟面上有,个大格，,个小格。,时针走个大格是,分针走个小格是,走大格是,时。,分，,分。,12,60,5,1,1,5,1个大格里面有（ ）个小格。,分针走圈是（ ）小格，是（ ）分,60,60,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,?,12,点,20,分,12:20,9,时,15,分,9:15,11,12,10,1,2,3,4,5,6,9,8,7,?,10,时,50,分,10:50,11,12,10,1,2,3,4,5,6,9,8,7,?,?,?,?,?,?,?,?,?,?,?,9,时,5,分,9:05,7,时,55,分,7:55,注意：在这种情况下，时针还没有到,8,，是在接近,8,的地方，而同时分针还没有到,12,的情况下，还是,7,时,11,12,10,1,2,3,4,5,6,9,8,7,4:15,4,时,15,分,5,10,15,?,?,?,?,想一想：,11,12,10,1,2,3,4,5,6,9,8,7,11,12,10,1,2,3,4,5,6,9,8,7,5,11,12,10,1,2,3,4,5,6,9,8,7,5,10,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,5,10,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,45,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,45,50,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,45,50,55,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,45,50,55,60,40,10,10,1,分针走一圈，时针正好走（ ）个大格，,1,时,=,（ ）分,60,1,时,=,60,分,分针走一圈，时针正好走一个大格,。,1,时,60,分,=,4,分,7,分,13,分,29,分,48,分,59,分,6,时,10,分,6,：,10,起床,开,始吃早餐,6,：,55,7,时5分,705,。,。,。,吃完早餐,开始上第一节课,8,：,15,课间锻炼,10,：,02,中午到家,11,：,29,吃午饭,11时59分,11：59,2：28,猜一猜,时针在,9,和,10,中间，分针指着几？,分针在,2,和,3,之间，可能是多少分？,算一算,邓老师洗菜,2,分钟，烧开水,10,分钟，切菜,6,分钟,.,一共要用多少时间？,你在一分钟的时间内,能做些什么？,请家长帮助你看时间，你自己做事，体会一分钟，到底有多长,世界上最宝贵的是,时间,同学们一定要,珍惜时间,!,120,855,12,1,2,3,4,5,6,7,8,9,10,11,7,时,52,分,12,1,2,3,4,5,6,7,8,9,10,11,9,时,18,分,12,1,2,3,4,5,6,7,8,9,10,11,1,时,08,分,1 08,：,12,1,2,3,4,5,6,7,8,9,10,11,4,时,47,分,4 47,：,谁最棒？,再过,5,分钟是（ ）,再早,5,分钟是（ ）,1,2,3,4,5,6,12,11,10,9,8,7,再过,5,分钟是（ ）,再早,5,分钟是（ ）,7,：,05,6,：,55,8,：,35,8,：,25,再过一个小时是（ ）,再早,1,个小时是（ ）,8:00,6,：,00,11,12,10,1,2,3,4,5,6,9,8,7,1,、再过,20,分钟是（ ）,2,、再早,20,分钟是（ ）,3,、再过,2,个小时是（ ）,4,、再早,2,个小时是（ ）,10:30,2:30,12:10,12:50,11,12,10,1,2,3,4,5,6,9,8,7,再过,40,分钟是什么时间呢？,用,10,时,30,分,+40,分,=10,时,70,分,可是一个小时只有,60,分，怎么办呢？聪明的你，好好想想,11,12,10,1,2,3,4,5,6,9,8,7,10,时,30,分,+40,分,=10,时,70,分,60,分,=1,时,10,分,10,时,70,分,11,时,10,分,11,12,10,1,2,3,4,5,6,9,8,7,再过,40,分钟是（ ）,11:10,1,、,9,时,30,分过,50,分钟是（ ）,2,、,8,时,10,分过,20,分钟是（ ）,3,、,10,时,50,分过,40,分钟是（ ）,10:20,8:30,11:30,时计时法,24,火车站,我下午,3,点就赶过来了，怎么还是晚了呢？,在一日（天）里，钟表上的时针正好走两圈,共,24,小时。所以，经常采用从,0,时到,24,时的计时方法，通常叫做,24,时计时法。,（,8,12,20,）,晚上,8,时,（普通计时法）,20,时,（,24,时计时法）,2001,年,7,月,13,日,22,时,中国申奥成功,2005,年,10,月,12,日,9,时,“神六”发射成功,普通计时法变为,24,小时计时法：,1,、凌晨早上和中午，去文字抄时间。,2,、下午或晚上，去文字加,12.,记住哦，中午,12,时还是,12,时,24,小时变为普通计时法：,1,、看到比,12,时小的，就加早上或凌晨，直接抄时间。,2,、比,12,时大的，就加下午或晚上，然后减去,12,，写时间。,记住哦，,12,时还是中午,12,时,用的是哪种计时法？照样子填一填。,下午,648,2105,1530,凌晨,350,晚上,9,时,24,时计时法,普通计时法,用的是哪种计时法？照样子填一填。,下午,648,2315,1955,上午,850,下午,5,时,24,时计时法,普通计时法,普通计时法,24,时计时法,起 床,上午,630,上 学,上午,700,午 休,中午,1200,放 学,下午,500,晚 饭,晚上,630,做作业,晚上,700,睡 觉,晚上,900,下面是小红作息时间表的一部分，你能用两种计时法来表示吗？,630,700,1200,1700,1830,1900,2100,我于,16,时,45,分到达深圳。,一辆汽车下午,2,时,40,分从广州开往深圳。,她一共用了多长时间？,她一共用了多长时间？,下午,2,时,40,分,16,时,45,分,13,14,15,16,17,她一共用了多长时间？,下午,2,时,40,分,16,时,45,分,13,14,15,16,17,14,时,40,分,时间,后,时刻 ,前,时刻,取信时间,第一次,830,第二次,第三次,你能标出取信时间吗？,每隔,4,小时,取一次信。,本街道每天禁止车辆通行的时间有多长？,我在校时间是,4,时,20,分。,小华每天早上,7,时半到校，,11,时,50,分放学他上午在校多少时间？,他上午在校多少时间？,储蓄业务每天的营业时间有多长？,再 见,