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,*,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,*,三里畈小学：陈郑,欢迎进入我们的课堂,把,1,米平均分成 份,。,1,分米,1,10,米,0.1,米,3,分米,米,6,分米,米,3,10,6,10,1,2,8,9,10,7,6,5,4,3,1,米,0.6,米,0.3,米,10,一位小数,10,20,30,40,50,60,70,80,90,1,米,1,2,3,9,10,5,4,6,7,8,把,1,米平均分成,100,份。,1,厘米,1,100,米,0.01,米,厘米,米,米,厘米,米,米,4,100,6,100,0.04,0.06,4,6,二位小数,1,厘米,把,1,米平均分成,1000,份。,1,1000,米,0.001,米,米,米,米,米,1,毫米,6,1000,0.006,13,1000,0.013,6,毫米,13,毫米,三位小数,1,10,3,10,6,10,0.1,0.3,0.6,一位小数,100,1,100,4,100,6,0.01,0.04,0.06,两位小数,1000,1,1000,6,1000,13,0.001 0.006 0.013,三位小数,分母是,10,、,100,、,1000,的分数可以用小数表示,分数：,小数：,6,10,7,10,32,100,0.6,0.7,0.32,做一做,0.3,里面有（）个,0.5,里面有（）个,1,10,1,10,3,5,一位小数的计数单位是,十分之一,写作：,0.1,第一关,0.07,里面有（）个,0.09,里面有（）个,1,100,1,100,两位小数的计数单位是,百分之一,写作：,0.01,7,9,第一关,0.007,里面有（）个,0.009,里面有（）个,1,1000,1,1000,三位小数的计数单位是,千分之一,写作：,0.001,7,9,第一关,0.1,米里面有,(),个,0.01,米。,10,0.1,0.01,0.001,（,10,）,（,10,）,0.01,米里面有,(),个,0.001,米。,10,每,相邻,两个计数单位间的,进率,是,10,。,第二关,0.7,里面有,(),个十分之一,。,7,0.06,里面有,(),个百分之一,。,6,0.119,里面有,(),个千分之一。,119,第二关,1,、找朋友，用线连一连。,第三关,13,100,9,10,47,1000,1,1000,0.047,0.13,0.9,0.001,3,个,(),是,0.03,。,0.01,15,个,(),是,0.015,。,0.001,8,个,(),是,0.8,。,0.1,第三关,想一想,说一说,:,你在这一节课里有什么收获有什么发现或想到了什么,?,在进行测量和计算时，往往不能正好得到整数的结果，这时常用,小数,来表示。,把整数,1,平均分成,10,份、,100,份、,1000,份,这样的一份或几份是十分之几，百分之几、千分之几,可以用小数来表示,。,小 结,小数的计数单位,是十分之一、百分之一、千分之一,分别写作,0.1,、,0.01,、,0.001,小数中，每相邻两个计数单位间的,进率是,10,。,十分之几是一位小数，百分之几是两位小数，千分之几是三位小数。,天才,=,汗水,+,的灵感,100,99,1,100,天才,=,汗水,+,的灵感,0.99,0.01,