教育专题：小数的意义课件

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,花园路小学 成仲敏,人教版小学数学四年级下册,10,7,10,5,10,2,观察这三个分数，思考：,(1),什么样的分数可以用一位小数表示？,(2),一位小数表示什么样的分数？,0.2,0.7,0.5,任务一：,感知小数的产生，,探究,小数的意义,任务一：,感知小数的产生，,探究,小数的意义,1000,6,0.006,1000,13,0.013,1000,123,0.123,10,7,一位小数,1,、,一组一组地,观察，思考,：什么样的分数可以写成什么样的小数？每种小数又能分别写成什么样的分数？,2,、,小组交流,，试用自己的话概括分数和小数的这种联系。,10,2,0.2,0.7,0.5,10,5,0.39,0.06,100,6,两位小数,100,39,100,28,0.28,1000,6,0.006,0.013,1000,13,三位小数,1000,123,0.123,概括小数的意义,分数：,小数：,分数：,小数：,分数：,小数：,0.7,10,7,0.32,100,32,0.6,10,6,任务二：,整理小数的计数单位和进率,填一填：,0.3,里有,3,个（）。,0.07,里有,7,个（）。,0.5,里有,5,个（）。,0.09,里有,9,个（）。,填一填：,0.1,米里有（）个,0.01,米。,0.01,米里有（）个,0.001,米,。,10,10,任务二：,整理小数的计数单位和进率,检测题,2,、你能找到几对双胞胎兄弟？请连一连。,0.8,是（）个,0.1,。,9,个,0.01,是（）。,0.021,里有,21,个（）,。,1,、填空,8,0.09,0.001,0.4,0.62,0.17,0.005,0.99,99,100,17,10,4,10,62,100,5,1000,