《认识几时几分》课件.ppt
,时,电子表示法:,7,7:00,12,1,2,3,4,5,6,7,8,9,10,11,时,电子表示法:,3,3:00,12,1,2,3,4,5,6,7,8,9,10,11,这是小明学校上课的时间,你们还会认吗?,认识几时几分,二(1)班,自学要求:,把你认为重要的新知识用“”圈出来,需要填空的地方填上。预习过程中有疑问的地方打上“?”。,每个大格分成5小格,2023/9/26,1,2,3,4,5,8,11,10,9,12,6,7,1分,分针是一小格一小格地走,走1小格是1分钟,走一大格()分。,20分,15分,10分,5分,5,25分,30分,35分,40分,45分,50分,55分,60分,2023/9/26,1,2,3,4,5,8,11,10,9,12,6,7,时针走()大格,分针正好走()圈,2023/9/26,1,2,3,4,5,8,11,10,9,12,6,7,时针走()大格,分针正好走()圈,1,1,(5),(10),(15),(20),(25),(30),(35),(40),(45),(50),(55),(60),8时,5分,8:,05,考考你,12时,12时,12:15,12:30,30分,15分,半,一刻,12时,55分,12:55,2023/9/26,观察钟面几时几分,(1)先看时针,时针走过数字几,就是几时。(2)再看分针走了几小格,就是几分。(3)合起来就是几时几分。,2023/9/26,2023/9/26,2023/9/26,填空,我最棒!,2023/9/26,一寸光阴一寸金,寸金难买寸光阴。,2023/9/26,我缺什么你来补!,5时30分,4时45分,