小学数学人教一年级时钟的识别.ppt

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 钟 表,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,1,9,5,4,3,2,8,7,6,0,52,50,53,51,48,44,49,47,40,37,41,38,32,28,33,29,60,58,59,56,54,57,55,24,20,25,21,16,13,17,14,45,42,46,43,35,34,39,36,30,26,31,27,22,18,23,19,11,10,15,12,外圈数字表示分，,分针,走到几或刚走过几是几分。,内圈数字表示时，,时针,走到几或刚走过几是几时。,12,1,2,3,4,5,6,7,8,9,11,10,1,9,5,4,3,2,8,7,6,0,52,50,53,51,48,44,49,47,40,37,41,38,32,28,33,29,60,58,59,56,54,57,55,24,20,25,21,16,13,17,14,45,42,46,43,35,34,39,36,30,26,31,27,22,18,23,19,11,10,15,12,时针,分针,认真观察，您们发现时针和分针有什么区别？,12,1,2,3,4,5,6,7,8,9,11,10,1,9,5,4,3,2,8,7,6,0,52,50,53,51,48,44,49,47,40,37,41,38,32,28,33,29,60,58,59,56,54,57,55,24,20,25,21,16,13,17,14,45,42,46,43,35,34,39,36,30,26,31,27,22,18,23,19,11,10,15,12,时针短，走得慢；分针长；走得快。,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,画一画，描一描。把下面钟面中的时针涂成红色；分针涂成黑色。,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,1 时,2 时,3 时,1:00,2:00,3:00,4 时,5 时,6 时,4:00,5:00,6:00,10时,11时,12时,10:00,11:00,12:00,7 时,8 时,9 时,7:00,8:00,9:00,通过观察，您们有什么发现？,时针指到几,分针指到,12,就是几时。,12,1,2,3,4,5,6,7,8,9,11,10,1 时,2 时,3 时,1:00,2:00,3:00,4 时,5 时,6 时,4:00,5:00,6:00,10时,11时,12时,10:00,11:00,12:00,7 时,8 时,9 时,7:00,8:00,9:00,8,时。时针指到,，分针指到,。,12,1,2,3,4,5,6,7,8,9,11,10,1 时,2 时,3 时,1:00,2:00,3:00,4 时,5 时,6 时,4:00,5:00,6:00,10时,11时,12时,10:00,11:00,12:00,7 时,8 时,9 时,7:00,8:00,9:00,3,时。时针指到,，分针指到,。,12,1,2,3,4,5,6,7,8,9,11,10,1 时,2 时,3 时,1:00,2:00,3:00,4 时,5 时,6 时,4:00,5:00,6:00,10时,11时,12时,10:00,11:00,12:00,7 时,8 时,9 时,7:00,8:00,9:00,6,时。时针指到,，分针指到,。,12,1,2,3,4,5,6,7,8,9,11,10,1,9,5,4,3,2,8,7,6,0,52,50,53,51,48,44,49,47,40,37,41,38,32,28,33,29,60,58,59,56,54,57,55,24,20,25,21,16,13,17,14,45,42,46,43,35,34,39,36,30,26,31,27,22,18,23,19,11,10,15,12,外圈数字表示分，,分针,走到几或刚走过几是几分。,内圈数字表示时，,时针,走到几或刚走过几是几时。,3时,3时,3,00,12,0,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,看谁读得又对又快,!,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,照样子连线，看谁连得又对又快,!,4：00,11：00,8：00,1：00,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,照样子拨一拨，看谁拨得又对又快,!,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,看一看，现在是几时？想一想，过,1,小时是几时？,在上面的三个钟里，只有一个是,8,时,（,8,00,）,。你知道是哪一个吗？为什么？,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,12,1,2,3,4,5,6,7,8,9,11,10,现在你知道哪一个是,8,时（,8,00,）了吗？为什么？,