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1、制作：月池小学制作：月池小学 郭光国郭光国Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.热身运动热身运动:你能把下面的小数化成分数吗？你能把下面的小数化成分数吗？ 0.731 1.990.1 0.23Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty
2、 Ltd.你能把下面的分数化成小数吗？你能把下面的分数化成小数吗？0.70.510.3741.3Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.3.把下面的分数化为百分数把下面的分数化为百分数.7%35%1.8%287%Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 A
3、spose Pty Ltd.27%124%0.4%0.251.40.123 谁能帮我们按从大到小的顺序排列谁能帮我们按从大到小的顺序排列?小数小数百分数百分数你可以把它们变成同一类型的数吗？你可以把它们变成同一类型的数吗？情景导入情景导入Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.小数小数百分数百分数 小数点向右移动两位小数点向右移动两位,加上加上%0.250.1231.425%12.3%140%你发现了什么？你
4、发现了什么？Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.解决问题解决问题:你能把下面的小数化成百分数吗？你能把下面的小数化成百分数吗？0.38 1.0538%38%300%300%5.5%5.5%105%105%0.055 3Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2
5、011 Aspose Pty Ltd.小数小数百分数百分数 27%124%0.4%0.271.240.004你发现了什么？你发现了什么？去掉去掉% ,小数点向左移动两位小数点向左移动两位Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.解决问题解决问题:1.把下面各个百分数化成小数把下面各个百分数化成小数.15% 80%3.5% 135%0.150.035 0.8 1.35更多全套课件免费下载：更多全套课件免费下载：绿
6、色圃中小学教育网绿色圃中小学教育网http:/Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.27%124%0.4%0.251.40.123从大到小排列：从大到小排列：Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.小数百分数小数点向右移动
7、两位小数点向右移动两位,加上加上%去掉去掉% ,小数点向左移动两位小数点向左移动两位Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.比较大小比较大小:0.52 52% 1.2 12.3%254% 0.254 0.25% 0.025Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2
8、011 Aspose Pty Ltd.把相等的数用线连起来：把相等的数用线连起来：0.2572%0.415106%1.317.6%130%0.17625%0.721.0641.5%Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.判断，对的打判断，对的打“”，错的打，错的打“”。1、1.041= 1041% （ ）2、2%= 0.02 （ ）3、100%= 1 （ ）4、300%= 0.3 （ ）5、0.8%= 0.08 （ ）Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.
