新人教版二年级数学上册认识钟表(课堂PPT).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,*,*,第,七,单元 认识钟表,课题二 认识钟表,1,我有个好朋友，,会跑没有腿，,会响没有嘴，,它会告诉我，,什么时候起，,什么时候睡。,请你猜猜看，,我这个好朋友是谁？,2,3,4,5,6,7,8,9,10,11,12,2,1,哪个是时针？哪个是分针？,3,3,4,5,6,7,8,9,10,11,12,2,1,用手跟着表针转一转。,4,3,4,5,6,7,8,9,10,11,12,2,1,用手跟着表针转一转。,5,3,4,5,6,7,8,9,10,11,12,2,1,早上,7,时你们在干什么？,6,3,4,5,6,7,8,9,10,11,12,2,1,上午,10,时你们在干什么？,7,3,4,5,6,7,8,9,10,11,12,2,1,下午,1,时你们在干什么？,午休,8,3,4,5,6,7,8,9,10,11,12,2,1,下午,4,时你们在干什么？,9,4,时,7,时,10,时,1,时,连线。,3,4,5,6,7,8,9,10,11,12,2,1,3,4,5,6,7,8,9,10,11,12,2,1,3,4,5,6,7,8,9,10,11,12,2,1,3,4,5,6,7,8,9,10,11,12,2,1,10,在自己的小钟表上拨一个整时。,11,6,时,12,时,12,3,4,5,6,7,8,9,10,11,12,2,1,13,3,4,5,6,7,8,9,10,11,12,2,1,下午,4,时半你们在干什么？,14,3,4,5,6,7,8,9,10,11,12,2,1,15,3,4,5,6,7,8,9,10,11,12,2,1,16,3,4,5,6,7,8,9,10,11,12,2,1,17,3,4,5,6,7,8,9,10,11,12,2,1,怎么看是,6,时半？,18,3,4,5,6,7,8,9,10,11,12,2,1,19,3,4,5,6,7,8,9,10,11,12,2,1,20,3,4,5,6,7,8,9,10,11,12,2,1,21,3,4,5,6,7,8,9,10,11,12,2,1,22,3,4,5,6,7,8,9,10,11,12,2,1,怎么看是,9,时半？,23,3,4,5,6,7,8,9,10,11,12,2,1,24,3,4,5,6,7,8,9,10,11,12,2,1,25,3,4,5,6,7,8,9,10,11,12,2,1,11,时半你们在干什么？,26,6,时半,4,时半,11,时半,9,时半,连线。,3,4,5,6,7,8,9,10,11,12,2,1,3,4,5,6,7,8,9,10,11,12,2,1,3,4,5,6,7,8,9,10,11,12,2,1,3,4,5,6,7,8,9,10,11,12,2,1,27,在自己的小钟表上拨一个半时。,28,你们见过这样的表吗？,7,时半怎么表示呢？,29,7,0,0,30,7,0,1,31,7,0,2,32,7,0,3,33,7,0,4,34,7,0,5,35,7,0,6,36,7,0,7,37,7,0,8,38,7,0,9,39,7,1,0,40,7,1,1,41,7,1,2,42,7,1,3,43,7,1,4,44,7,1,5,45,7,1,6,46,7,1,7,47,7,1,8,48,7,1,9,49,7,2,0,50,7,2,1,51,7,2,2,52,7,2,3,53,7,2,4,54,7,2,5,55,7,2,6,56,7,2,7,57,7,2,8,58,7,2,9,59,7,3,0,60,7,3,0,61,哪个是整时？哪个是半时？,整时,半时,半时,3,4,5,6,7,8,9,10,11,12,2,1,3,4,5,6,7,8,9,10,11,12,2,1,3,4,5,6,7,8,9,10,11,12,2,1,3,4,5,6,7,8,9,10,11,12,2,1,3,4,5,6,7,8,9,10,11,12,2,1,62,这个钟面的时刻，,可以怎样说？,请选择：,快,2,时,过,2,时,大约,2,时,3,4,5,6,7,8,9,10,11,12,2,1,63,这个钟面的时刻，,可以怎样说？,请选择：,快,2,时,过,2,时,大约,2,时,3,4,5,6,7,8,9,10,11,12,2,1,64,请把,5,个钟面按时间顺序排一排。,3,4,5,6,7,8,9,10,11,12,2,1,3,4,5,6,7,8,9,10,11,12,2,1,3,4,5,6,7,8,9,10,11,12,2,1,3,4,5,6,7,8,9,10,11,12,2,1,3,4,5,6,7,8,9,10,11,12,2,1,65,请把,5,个钟面按时间顺序排一排。,3,4,5,6,7,8,9,10,11,12,2,1,3,4,5,6,7,8,9,10,11,12,2,1,3,4,5,6,7,8,9,10,11,12,2,1,3,4,5,6,7,8,9,10,11,12,2,1,3,4,5,6,7,8,9,10,11,12,2,1,66,各种各样的小钟表,67,12,3,6,9,8,:,00,8,时,猜一猜钟面上的时刻。,68,12,3,6,9,猜一猜。,3,:,00,3,时,11,10,8,7,5,4,69,12,3,6,9,猜一猜。,11,:,30,11,时半,1,:,30,1,时半,2,:,30,2,时半,5,4,7,2,11,8,12,:,30,12,时半,3,:,30,3,时半,4,:,30,4,时半,5,:,30,5,时半,70,各种各样的小钟表,71,72,古老的带底架的座钟,73,“手表”“怀表”是人们可以随身携带的表,74,现代的计时工具“电子表”,75,古代的一种计时工具“日晷”,“沙漏”也是一种计时工具,76,再见,77,