时、分、秒的认识课件.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,*,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,*,时、分、秒,猜谜语,世上有件宝，黄金买不到。一去不复返，愿你珍惜好。是,(),时间,12,1,2,3,4,5,6,7,8,9,10,11,说说看，钟面上有什么？,11,12,10,1,2,3,4,5,6,9,8,7,11,12,10,1,2,3,4,5,6,9,8,7,1,11,12,10,1,2,3,4,5,6,9,8,7,5,11,12,10,1,2,3,4,5,6,9,8,7,5,10,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,5,10,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,45,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,45,50,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,45,50,55,11,12,10,1,2,3,4,5,6,9,8,7,5,10,15,20,25,30,35,40,45,50,55,60,1,时,=60,分,圆圆一大家，,兄弟,12,个 ，,各有,5,个小宝宝，,60,宝宝手牵手,，亲亲密密围成圆；,时针爸爸短又粗，懒懒洋洋走大格，一走就是,1,小时；,分针妈妈细又长，不急不慢走大格，一走就是,5,分钟；,瞧这一大家，报时可是全靠他。,（,12,个数字）,（,1,大格里有,5,小格）,（一圈,60,小格）,（,1,大格是,1,小时）,（,1,小格是,1,分钟，,1,大格是,5,分钟）,12,1,2,3,4,5,6,7,8,9,10,11,12,时针与分针的关系,填一填,钟面上有,个大,格，,个小格。,时针走个大格是,分针走个小格是,时针走个大格，分针正好走,走大格是,时。,分，,圈，,分。,是,分。,1,时,=,（）,12,60,1,1,5,1,60,60,分,想想做做,1,分钟脉搏大约跳（,70,）次。,1,分钟大约做（,1,）节眼保健操。,1,分钟大约跳（,60,）下绳。,下面的计算，你能在,1,分钟内完成吗？,97=459=25+9=,284=76=213=,39=546=42-8=,63,5,34,7,42,7,27,9,34,一节课是（）分钟，课间休息（）,分钟，再加上（）分钟是,1,小时。,40,10,10,总结：,通过这节课的学习，你有什么收获？,“时间就是生命，时间就是速度，时间就是,力量”,鲁迅,好好学习,再见,