1、认识整万数 (3)(精品)

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,*,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,*,认识整万数,苏教版小学数学四年级下册,执教者：滁州市第二实验小学 王玲,()(),1023,3002,90240000,1142,11420000,，,，,，,十万,百万,千万,按照我国的计数习惯，从右边起，,每四个数位是一级。,写出下面各数,二万 六万,2,0000,6,0000,下面这些数你会读吗？,120000 150000,200000 500000,下面这些数你会读吗？,12,0000,65,0000,一,十二,万,六十五,万,20,0000,50,0000,二十,万,五十,万,读一读，比一比。,85,和,850000,850,和,8500000,8500,和,85000000,805,和,8050000,8005,和,80050000,8050,和,80500000,读一读，比一比。,85,和,850000,850,和,8500000,8500,和,85000000,805,和,8050000,8005,和,80050000,8050,和,80500000,读一读，比一比。,85,和,85,0000,850,和,8500000,8500,和,85000000,805,和,8050000,8005,和,80050000,8050,和,80500000,读一读，比一比。,85,和,85,0000,850,和,8500000,8500,和,85000000,805,和,805,0000,8005,和,80050000,8050,和,80500000,读一读，比一比。,85,和,85,0000,850,和,850,0000,8500,和,85000000,805,和,805,0000,8005,和,80050000,8050,和,80500000,读一读，比一比。,85,和,85,0000,850,和,850,0000,8500,和,85000000,805,和,805,0000,8005,和,8005,0000,8050,和,80500000,读一读，比一比。,85,和,85,0000,850,和,850,0000,8500,和,8500,0000,805,和,805,0000,8005,和,8005,0000,8050,和,80500000,读一读，比一比。,85,和,85,0000,850,和,850,0000,8500,和,8500,0000,805,和,805,0000,8005,和,8005,0000,8050,和,8050,0000,读出下面各数,400000,5200000,40200000,8000000,72000000,天安门广场是世界上最大的城市广场，面积有,400000,平方米。,北京著名园林颐和园占地,2900000,平方米。,河西地区一套建筑面积,80,平方米的商品房价值约,400000,元,.,大约,六千五百万,年前，恐龙突然灭绝了，原因到现在还是个谜。,全世界可确认的昆虫大约有,七十万,种。,大约,6500,0000,年前，恐龙突然灭绝了，原因到现在还是个谜。,全世界可确认的昆虫大约有,七十万,种。,大约,6500,0000,年前，恐龙突然灭绝了，原因到现在还是个谜。,全世界可确认的昆虫大约有,70,0000,种。,今天你有什么收获？,