《“分数王国”与“小数王国”》教学课件.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,*,“,分数王国,”,与,“,小数王国,”,情境导入,比一比，,0.06,与 哪个数大？,1,20,新知探究,比一比，,0.06,与 哪个数大？,1,20,0.06,1,20,新知探究,比一比，,0.06,与 哪个数大？,1,20,1,20,=1,20=,0.05,0.06,0.05,0.06,1,20,新知探究,比一比，,0.06,与 哪个数大？,1,20,100,0.06=,0.06,1,20,6,6,1,20,=,5,100,6,100,5,100,新知探究,“,分数王国,”,和,“,小数王国,”,分别有不同的尺子，你能帮助,“,翻译,”,吗？,1,8,2,8,3,8,4,8,5,8,6,8,7,8,8,8,0,1,8,=1,8=,0.125,新知探究,“,分数王国,”,和,“,小数王国,”,分别有不同的尺子，你能帮助,“,翻译,”,吗？,1,8,2,8,3,8,4,8,5,8,6,8,7,8,8,8,0,4,8,=4,8=,0.5,新知探究,“,分数王国,”,和,“,小数王国,”,分别有不同的尺子，你能帮助,“,翻译,”,吗？,1,8,2,8,3,8,4,8,5,8,6,8,7,8,8,8,0,6,8,=6,8=,0.75,新知探究,“,分数王国,”,和,“,小数王国,”,分别有不同的尺子，你能帮助,“,翻译,”,吗？,1,8,2,8,3,8,4,8,5,8,6,8,7,8,8,8,0,7,8,=7,8=,0.875,新知探究,“,分数王国,”,和,“,小数王国,”,分别有不同的尺子，你能帮助,“,翻译,”,吗？,1,8,2,8,3,8,4,8,5,8,6,8,7,8,8,8,0,0.125,0.5,0.75,0.875,新知探究,“,分数王国,”,和,“,小数王国,”,分别有不同的尺子，你能帮助,“,翻译,”,吗？,0,0.05,0.1,0.15,0.2,0.25,0.3,0.35,0.4,0.45,0.5,25,100,0.25=,1,4,=,新知探究,“,分数王国,”,和,“,小数王国,”,分别有不同的尺子，你能帮助,“,翻译,”,吗？,0,0.05,0.1,0.15,0.2,0.25,0.3,0.35,0.4,0.45,0.5,15,100,0.15=,3,20,=,新知探究,“,分数王国,”,和,“,小数王国,”,分别有不同的尺子，你能帮助,“,翻译,”,吗？,0,0.05,0.1,0.15,0.2,0.25,0.3,0.35,0.4,0.45,0.5,4,10,0.4=,2,5,=,新知探究,“,分数王国,”,和,“,小数王国,”,分别有不同的尺子，你能帮助,“,翻译,”,吗？,0,0.05,0.1,0.15,0.2,0.25,0.3,0.35,0.4,0.45,0.5,45,100,0.45=,9,20,=,新知探究,“,分数王国,”,和,“,小数王国,”,分别有不同的尺子，你能帮助,“,翻译,”,吗？,0,0.05,0.1,0.15,0.2,0.25,0.3,0.35,0.4,0.45,0.5,1,4,3,20,9,20,2,5,新知探究,把下面的小数化成分数或把分数化成小数。,4,25,=4,25=,0.16,7,4,0.24,1.8,4,25,=7,4=,1.75,7,4,24,100,0.24=,6,25,=,18,10,1.8=,9,5,=,练一练,巩固练习,1.,比较下面各组数的大小，说一说你是怎样比较的。,1,9,0.1,1,10,0.09,5,3,1.66,练一练,巩固练习,2.,在里填上适当的分数或小数,。,课堂小结,这节课你学会了吗？,