复件复件小数的意义和性质的复习.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,*,设计：,zhaoyong,小数的意义、性质复习,现代小学数学,六年制课本第八册,小数的意义、性质,小数的组成,小数的数位顺序与计数单位,小数的读、写法,小数的大小比较,小数的化简、改写,5.1 9 3,0.1,0.01,0.001,9,3,1,5,1,数位名称,计数单位,整数部分,小数部分,小数点,个,位,一,十,位,十,百,位,百,十分,位,十分之一,百分之一,百分,位,千分之一,千分,位,0.1 0.01 0.001,0.1,里有,(),个,0.01;,0.01,里有,(),个,0.001;,10,10,小数,与,整数,一样,相邻的两个计数单位,之间的进率都是,10,。,整数与小数,读法的不同,:,3005,三千零五,0.3005,零点三零零五,请你读出下面各数,6.772 29.46 0 0.84 0.0027 4.228 12.506,小数的末尾,添上,“,0,”,或者,去掉,“,0,”,，小数的大小不变。这叫做,小数的性质,。,而,整数,不具有这样的性质,。,403.0600,403.0600,600,30.3,30.3,00,6000,、,6,600,.,0,你能把与,0.17,相等的数,找出来吗,?,0.1700,0.710,0.701,170,1000,170,100,8.0 2 5 8.0 4,比较,小数,大小的方法和,整数一样,。,8.04 ()8.025,个,位,十分位,百分位,千分位,用,若干个,0,和,7,，写出从小到大,整数部分是,0,的四个,四位小数,：,()()()(),0.000,7,0.00,7,0,0.0,7,00,0.,7,000,0.000,7,0.00,77,0.0,777,0.,7777,0,0.1,0.2,练习,:,(1),图中每一个单位表示多少,?,(2),在方框里填入正确的数。,0.04,0.16,0.24,