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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,*,小数的意义,从下面学习材料中任选一个，分一分、涂一涂、圈一圈，把你心目中的,0.3,表示出来。,1元,0,1m,1元,0,1m,0.3,米,0.3,元,0.3,把,1,米平均分成,10,份。,0,1m,0.3 m,3 dm,10,3,m,10,1,m,0.1 m,1 dm,0.7 m,7 dm,10,7,m,一位小数表示（）,十分之几,0.3 m,0.3 m,把,1,米平均分成,10,份。,0,1m,0.3 m,3 dm,10,3,m,10,1,m,里有,3,个,0.1 m,0.1 m,1 dm,0.7 m,7 dm,10,7,m,一位小数表示（）,十分之几,0.9,里面有（）个十分之一。,（）个,0.1,是,0.5,。,9,5,里有,7,个,0.1 m,3,个,m,10,1,里有,7个,m,10,1,里有,0.01,100,4,0.04,100,8,0.08,0.001,1000,6,0.006,1000,13,0.013,100,1,0.01,100,4,0.04,100,8,0.08,10,1,0.1,10,3,0.3,10,7,0.7,1000,1,0.001,1000,6,0.006,1000,13,0.013,一位小数表示十分之几,计数单位是 十分之一,写作：,0.1,两位小数表示百分之几,三位小数表示千分之几,计数单位是 百分之一,写作：,0.01,计数单位是 千分之一,写作：,0.001,1 0.1 0.01 0.001,1,米,0.1,米,0.01,米,0.001,米,10,个,10,个,10,个,1米 1分米 1厘米 1毫米,0.9,里面有（）个,0.1,。,0.672,里面有（）个,0.001,。,0.25,是（）位小数，计数单位是（），,有（）个,0.01,。,填一填。,9,672,25,0.01,两,2,个,0.1,0.12 0.2 1.2,连一连。,2,10,12,100,0,1,2,3,1,2,10,00,选一选，涂色部分能表示,0.4,的是（）。,A,B,C,A C,1 0.1 0.01 0.001,1,米,1,米,1,米,1,分米,0.1,10,1,米,米,1,厘米,0.01,100,1,米,米,1,毫米,0.001,1000,1,米,米,0.1,0.01,0.001,(),个,(),个,10,10,1,(),个,10,选其中两幅图把你心目中的,0.3,表示出来。,1元,0,1,2,3,1 0.1 0.01 0.001,1,米,1,米,1,米,1,分米,0.1,10,1,米,米,1,厘米,0.01,100,1,米,米,1,毫米,0.001,1000,1,米,米,10,个,10,个,10,个,一位小数表示（）,十分之几,0,1,2,3,观察数轴，回答下面问题：,0.9,里面有（,）个十分之一（,0.1,）。,1.2,里面有（,）个十分之一（,0.1,）。,9,12,0.9,先在括号里写一个整数部分是,0,的两位小数。,根据自己写的两位小数，完成练习。,(,),米,=,米,(),(),选一张正方形图，用阴影部分表示出这个小数。,同桌说一说如何在米尺上找出这个小数。,一位小数表示（）,十分之几,两位小数表示（）,百分之几,1,、,=,（）用小数表示,2,、,0.667=,（）用分数表示,3,、,0.145,表示（）。,4.0.324,里面有（）个,0.001,。,57,个,0.001,是（）。,1000,457,小练习：,0.457,1000,667,324,0.057,千分之一百四十五,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,你能说清,0.1,、,0.01,、,0.001,之间的关系吗,?,0.1,0.01,0.001,(),个,(),个,10,10,(),个,100,每相邻两个计数单位间的进率是,(),。,10,把,1,米平均分成,10,份。,0,1m,0.3 m,3 dm,10,3,m,10,3,m,10,3,m,10,3,m,10,3,m,10,1,m,0.1 m,1 dm,0.7 m,7 dm,10,7,m,一位小数表示（）,十分之几,选其中两幅图把你心目中的,0.3,表示出来。,1元,0,1,2,3,选其中两幅图把你心目中的,0.3,表示出来。,1元,从下面学习材料中选择一个，分一分、涂一涂、圈一圈，把你心目中的,0.3,表示出来。,1元,0,1m,把,1,米平均分成,10,份。,0,1m,0.3 m,3 dm,10,3,m,10,3,m,10,3,m,10,3,m,10,3,m,10,1,m,0.1 m,1 dm,0.7 m,7 dm,10,7,m,一位小数表示（）,十分之几,把,1,米平均分成,10,份。,0,1m,0.3 m,3 dm,10,3,m,10,1,m,3,个,m,10,1,3,个,0.1 m,0.1 m,1 dm,0.7 m,7 dm,10,7,m,一位小数表示（）,十分之几,0.9,里面有（）个十分之一。,（）个,0.1,是,0.5,。,9,5,7,个,0.1 m,把,1,米平均分成,10,份。,0,1m,0.3 m,3 dm,10,3,m,10,3,m,10,3,m,10,3,m,10,3,m,10,1,m,0.1 m,1 dm,把,1,米平均分成,10,份。,0,1m,0.3 m,3 dm,10,3,m,10,1,m,3,个,m,10,1,3,个,0.1 m,0.1 m,1 dm,0.7 m,7 dm,10,7,m,一位小数表示（）,十分之几,0.9,里面有（）个十分之一。,（）个,0.1,是,0.5,。,9,5,7,个,0.1 m,从下面学习材料中任选一个，分一分、涂一涂、圈一圈，把你心目中的,0.3,表示出来。,1元,0,1m,把,1,米平均分成,10,份。,0,1m,0.3 m,3 dm,10,3,m,10,1,m,里有,3,个,0.1 m,0.1 m,1 dm,0.7 m,7 dm,10,7,m,一位小数表示（）,十分之几,0.9,里面有（）个十分之一。,（）个,0.1,是,0.5,。,9,5,里有,7,个,0.1 m,3,个,m,10,1,里有,2,个,0.01 12,个,0.01,0.12 0.02 0.2 1.2,连一连。,2,10,2,100,12,100,0,1,2,3,
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