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1、小数的产生和意义,0.90元,2.85元,5.98元,我的身高是1.41米。,我的体重是39.4千克。,1分米,0.1米,3分米,0.3米,7分米,0.7米,一 位 小 数,1厘米,0.01米,3厘米,0.03米,6厘米,0.06米,两 位 小 数,1厘米,0.001米,0.006米,0.013米,三 位 小 数,1毫米,6毫米,13毫米,1,10,0.1,10,0.3,10,0.7,3,7,一 位小数,1,100,0.01,100,0.03,100,0.06,3,6,两位小数,1,1000,0.001,1000,0.006,1000,0.013,6,13,三 位小数,分母是10、100、10
2、00的分数可以用小数表示。,分数:,小数:,做一做,0.6,0.7,0.32,0.3里面有 ( )个,0.5里面有 ( )个,0.07里面有( )个,0.26里面有( )个,小数的计数单位是十分之一,百分之一,千分之一 分别写作0.1,0.01,0.001,3,5,7,26,填一填,1,10,1,100,1,100,1,10,10,10,每相邻两个计数单位间的进率是10。,0.56里面有( )个0.01,1里面有( )个0.1,0.9里面有( )个0.1,56,728,你能回答小鸟们的问题吗?,1里面有( )个0.01,1里面有( )个0.001,0.05里面有( )个0.01,10,100,1000,9,5,0.728里面有( )个0.001,10,3,1000,15,100,29,0.3,0.15,0.015,100,15,连一连,0.29,对口令,同桌两人,一人说分 母是10、100、1000的分 数,另一人说出小数,然 后互调。,再见,