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1、这时你可能在做什么?,这时你可能在做什么?,12,9,1,8,7,6,4,3,2,5,11,10,0,0,10月28日,12,9,1,8,7,6,4,3,2,5,11,10,0,1,2,3,4,5,6,7,8,9,10,11,12,12,9,1,8,7,6,4,3,2,5,11,10,0,1,2,3,4,5,6,7,8,9,10,11,12,12,9,1,8,7,6,4,3,2,5,11,10,13,0,1,2,3,4,5,6,7,8,9,10,11,12,13,12,9,1,8,7,6,4,3,2,5,13,11,10,14,0,1,2,3,4,5,6,7,8,9,10,11,12,13,1
2、4,12,9,1,8,7,6,4,3,2,5,13,11,10,14,15,0,1,2,3,4,5,6,7,8,10,11,12,13,14,15,9,12,9,1,8,7,6,4,3,2,5,13,11,10,14,16,15,0,1,2,3,4,5,6,7,8,10,11,12,13,14,15,9,16,12,9,1,8,7,6,4,3,2,5,13,11,10,14,16,15,17,0,1,2,3,4,5,6,7,8,10,11,12,13,14,15,9,16,17,12,9,1,8,7,6,4,3,2,5,13,11,10,14,16,15,18,17,0,1,2,3,4,5,6
3、,7,8,10,11,12,13,14,15,9,16,17,18,12,9,1,8,7,6,4,3,2,5,13,11,10,14,16,19,15,18,17,0,1,2,3,4,5,6,7,8,10,11,12,13,14,15,9,16,17,18,19,12,9,1,8,7,6,4,3,2,5,13,11,10,14,16,19,15,18,17,20,0,1,2,3,4,5,6,7,8,10,11,12,13,14,15,9,16,17,18,19,20,12,9,1,8,7,6,4,3,2,5,13,11,10,14,16,19,15,18,17,21,20,0,1,2,3,4,
4、5,6,7,8,10,11,12,13,14,15,9,16,17,18,19,20,21,12,9,1,8,7,6,4,3,2,5,13,11,10,14,16,19,15,18,17,21,22,20,0,1,2,3,4,5,6,7,8,10,11,12,13,14,15,9,16,17,18,19,20,21,22,12,9,1,8,7,6,4,3,2,5,13,11,10,14,16,19,15,18,17,23,21,22,20,0,1,2,3,4,5,6,7,8,10,11,12,13,14,15,9,16,17,18,19,20,21,22,23,12,9,1,8,7,6,4,3
5、,2,5,13,11,10,14,16,19,15,18,17,24,23,21,22,20,0,1,2,3,4,5,6,7,8,10,11,12,13,14,15,9,16,17,18,19,20,21,22,23,24,一天结束了,在这一天中,时针走了几圈?一共经过了多少个小时?,第一圈:从()时到()时;即从()时到()时。第二圈:从()时到()时;即从()时到()时。,0,12,深夜12,中午12,12,24,中午12,深夜12,0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24,12 1 2 3 4 5 6
6、 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12,(2圈),(24个小时),12个小时,12个小时,1、用24时计时法表示出下面的时刻,2、17 时是下午几时?23 时是晚上几时?,下午 3 时 上午 10 时 晚上 9 时下午 6 时 晚上 10 时 下午 2 时,15 时,10 时,21 时,18 时,22 时,14 时,3、用普通计时法表示下面的时刻,6时 12时时30分24时 16时18时45分,早上 6 时,中午 12 时,上午 9 时 30 分,下午 6 时 45 分,下 4 时,深夜 12 时,银行储蓄业务上午几时几分开始,下午几时分停止?,这
7、一路公共汽车最早是几时几分开出?最晚呢?,从上午几时几分到下午几时几分这段路禁止小汽车通行?,妈妈去秦皇岛,她下午几时前到南京火车站比较合适?,你知道下面钟面上的时间用24时记时法表示是几时吗?,8:00,你知道下面钟面上的时间用24时记时法表示是几时吗?,12:00,你知道下面钟面上的时间用24时记时法表示是几时吗?,15:00,你知道下面钟面上的时间用24时记时法表示是几时吗?,10:00,你知道下面钟面上的时间用24时记时法表示是几时吗?,17:00,你能用24时记时法播报节目吗?(同桌互相练习),红领巾广播站节目预报上午时分学校新气象中午时儿童歌曲欣赏下午时健康教育下午时科学家故事,你能给上面的钟面画上时针、分针吗?,时间,每天得到的都是24小时,可是一天的时间给勤勉的人带来了智慧与力量,给懒散的人只能留下一片悔恨。-鲁迅,