小学数学：《时分的认识》课件(人教版三年级上).ppt

,时 分的认识,人教新课标版三年级数学上册,12,1,2,3,4,5,6,7,8,9,10,11,看一看小钟上面都有些什 么！,时针,分针,秒针,时针,分针,秒针,每个大格分成 个小格。,钟面上一共有 个小格,5,钟面上一共有,个大格。,12,60,12,1,2,3,4,5,6,7,8,9,10,11,5,10,15,20,25,30,35,40,45,50,55,60,12,2,1,11,9,6,3,4,5,7,8,10,时针走1小时，分针正好走，是,分。,一圈,60,时=分,1,60,分针走一小格的时间是1分。,时针走一大格的时间是1小时。,分,感受一分钟,一分钟的价值,一分钟点钞机点1500张人民币 一分钟高速火车可行驶1980米 一分钟人造卫星可运行1920公里 一分钟生产煤炭1902吨、发电106423度 一分钟激光可走1800万公里，等于绕地球450圈,40,10,10,一节课是（）分 课间休息是（）分 再加上（）分就是1小时,填一 填,.,.,.,.,.,.,.,.,.,.,.,.,.,12,3,6,9,1,2,4,5,7,8,10,11,1 时,1,钟表上分针指着12，时针指着数字几，这时的时刻就是几时。,00,：,.,.,.,.,.,.,.,.,.,.,.,.,.,12,3,6,9,1,2,4,5,7,8,10,11,4 时,4：00,.,.,.,.,.,.,.,.,.,.,.,.,.,12,3,6,9,1,2,4,5,7,8,10,11,6 时,6：00,.,.,.,.,.,.,.,.,.,.,.,.,.,12,3,6,9,1,2,4,5,7,8,10,11,9 时,9：00,.,.,.,.,.,.,.,.,.,.,.,.,.,12,3,6,9,1,2,4,5,7,8,10,11,钟表上时针刚走过数字几，分针从12起,走了多少个小格，,这时的时刻就是几时几分。,10时15分,：,10,15,.,.,.,.,.,.,.,.,.,.,.,.,.,12,3,6,9,1,2,4,5,7,8,10,11,4时45分,4：45,.,.,.,.,.,.,.,.,.,.,.,.,.,12,3,6,9,1,2,4,5,7,8,10,11,6时5分,6：5,0,.,.,.,.,.,.,.,.,.,.,.,.,.,12,3,6,9,1,2,4,5,7,8,10,11,8时55分,8：5 5,.,.,.,.,.,.,.,.,.,.,.,.,.,12,3,6,9,1,2,4,5,7,8,10,11,时针刚过数字几，就是表示几时多；要问多了多少分，请你仔细看分针。,说出钟面所表示的时刻。,8时,9时30分,7时35分,2时55分,选择正确的时刻,看钟面,想一想 哪种动物的睡眠时间少？,把显示相同时刻的电子钟和闹钟用线连起来。,12,1,2,6,3,5,4,7,8,9,10,11,请你回家统计你爸爸、妈妈一天的时间安排！,课后拓展：,【更多精品】狂点,感谢阅读,