一年级数学上册 第八单元 认识钟表.ppt

1、小学数学人教版一年级上册,认 识 钟 表,执 教：孟令军,.,分针,时针,秒针,.,1,11,10,9,8,7,2,3,4,12,5,6,时针,分针,秒针,a,3,分 针,时针,a,4,长针是分针，短针是时针,分针指着，时针指着几，就是几时,a,5,7 时,7 :0 0,a,6,8 时,8:0 0,a,7,11 时,11: 0 0,a,8,5 时,5:0 0,a,9,8 时,8 : 0 0,a,10,a,11,长长的分针指着12，,短短的时针指着几,就是几时。,7 时,11 时,6 时,5 时,a,12,.,1,11,10,9,8,7,2,3,4,12,5,6,1格,a,13,.,1,11,1

2、0,9,8,7,2,3,4,12,5,6,a,14,.,1,11,10,9,8,7,2,3,4,12,5,6,a,15,.,1,11,10,9,8,7,2,3,4,12,5,6,a,16,.,1,11,10,9,8,7,2,3,4,12,5,6,a,17,.,1,11,10,9,8,7,2,3,4,12,5,6,a,18,.,1,11,10,9,8,7,2,3,4,12,5,6,a,19,.,3时,分针指向12,时针指向几就是几时。,a,20,认 识 钟 表,12,1,2,3,4,5,6,7,8,9,10,11,a,21,.,11时半,分针指向6时，是半时，再看时针，合在一起就是几时半。,a,

3、22,12,1,2,3,4,5,6,7,8,9,10,11,12,1,2,3,4,5,6,7,8,9,10,11,3点整,3点半,a,23,12,整点,6,半点,12,1,2,3,4,5,6,7,8,9,10,11,认 识 钟 表,a,24,读一读,6,12,3,9,a,25,a,26,6,12,3,9,a,27,12,6,9,3,a,28,12,6,9,3,a,29,6,12,3,9,a,30,6时,a,31,7时半,a,32,8时,a,33,4时,a,34,12时,a,35,8时半,9,8,a,36,3,3时,a,37,3,3时半,4,a,38,7,6时半,6,a,39,5时,5,a,40

4、,1时,4时,6时,你发现了什么？,a,41,a,42,a,43,3,1,5,9,10,11,12,6,6,1时,11时半,9时半,3时,5是半,a,44,找朋友,12时 5时半 3时 9时半,a,45,6时,2时半,9时,1时,读出钟面上的时间,a,46,a,47,上午时,晚上时,a,48,晚上12时,a,49,a,50,a,51,a,52,a,53,a,54,a,55,a,56,a,57,a,58,a,59,a,60,a,61,a,62,a,63,12,6,9,3,a,64,12,6,9,3,1时半,a,65,12,6,9,3,a,66,猜一猜,猜一猜,提示1: 分针指着12,提示2: 时针指着11,提示3: 这时满天闪烁着星星,答案:晚上11时,a,67,猜一猜,猜一猜,提示1: 同学们快下课了,提示2: 时针指着12,提示3: 分针指着12,答案:中午12时,a,68,请说出过小时是几时,.,1,11,10,9,8,7,2,3,4,12,5,6,a