《小数的产生和意义》

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,*,小数的产生和意义,把,1,米平均分成,10,份,1,分米,0.1,米,米,1,10,3,分米,0.3,米,米,3,10,6,分米,0.6,米,米,6,10,可以写成,。,一位小数表示,十分之几,。,0,10,20,30,40,50,60,70,90,80,1,米,0,1,2,3,4,5,6,7,9,8,10,分米,（,1,米）,一位小数,的计数单位是十分之一，写作,0.1,。,分母是,10,的分数,一位小数,1,厘米,0.01,米,把,1,米平均分成,100,份,5,厘米,0.05,米,11,厘米,0,厘米,2,3,4,5,6,7,9,8,1,0,1,1,1,0.11,米,可以写成,。两位小数表示,百分之几,。,米,1,100,米,5,100,米,11,100,两位小数,的计数单位是百分之一，写作,0.01,。,分母是,100,的分数,两位小数,0,厘米,1,1,毫米,0.001,米,米,1,1000,7,毫米,0.007,米,米,7,1000,14,毫米,0.014,米,米,14,1000,把,1,米平均分成,1000,份,0,厘米,1,可以写成,。三位小数表示,千分之几,。,三位小数,的计数单位是千分之一，写作,0.001,。,分母是,1000,的分数,三位小数,小 数 的 意 义：,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,。,分母是,10,的分数可以写成,一位小数,。,分母是,100,的分数可以写成,两位小数,。,分母是,1000,的分数可以写成,三位小数,。,分数,_,小数,_,0.6,6,10,考一考,分数,_,小数,_,0.7,7,10,分数,_,小数,_,0.32,32,100,将下列分数写成小数：,57,1000,9,10,263,1000,8,100,=,0.9,=,0.263,=,0.057,=,0.08,0.5=0.014=,0.07=0.305=,将列小数写成分数：,5,10,14,1000,305,1000,8,100,0.001,0.01,米里面有（）个,0.001,米。,每,相邻,两个计数单位间的进率是（）,0.1,米里面有（）个,0.01,米。,填一填,10,10,10,0.1 0.01,10,10,0.1,米里面有（）个,0.1,米。,1,填空,0.01,0.001,4,72,2.467,是四位小数。（）,16,个百分之一和,16,个千分之一正好相等。,（）,判断,0.03,0.98,1000,100,10,0.04,的计数单位是（），,0.04,里面有（）个,0.01,。,0.072,的计数单位是（），,0.072,里面有（）个,。,3,个,0.01,是（），,98,个,0.01,是（）。,1,里面有（）个,0.1,（）个,0.01,，（）个,0.001,。,1,1000,通过这节课的学习，你有什么收获？,