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1、百分数与小数、 分数的互化,麻城小学：郑冰,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,0.45 1.2 0.367,先把下面的小数化成分数，再说一说小数化分数的方法。,先化成分母是10、100、1000的分数，再约分。,小数,分数,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyrig
2、ht 2004-2011 Aspose Pty Ltd.,先把下面的分数化成小数，再说一说分数化小数的方法。,用分子除以分母,分数,小数,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,三天打渔两天晒网,十二分满意,褒贬参半,50%,120%,60%、40%,你还想了解百分数的哪些知识？,Evaluation only. Created with Aspose.Slides for .NET 3.5 Clien
3、t Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,1,把0.24、1.4、0.123化成百分数。,0.24,1.4,0.123,百分数是分母为100的特殊分数。,24%,140%,12.3%,小数,分母是100的分数,百分数,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,做一做,把下面各数化成百分数。,0.51,51%,207%,2.07,0.025
4、,4,2.5%,400%,想一想：怎样能很快地把小数化成百分数？,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,51,51,.,%,0,把小数化成百分数，只要把小数点向右移动两位，同时在后面添上百分号。,.,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 A
5、spose Pty Ltd.,2,把27%、135%、0.4%化成小数。,27%,135%,0.4%,0.27,1.35,0.004,百分数,小 数,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,把下面各百分数化成小数。,21%,0.21,0.9,90%,4.5%,0.045,想一想：怎样能很快地把百分数化成小数？,Evaluation only. Created with Aspose.Slides for
6、 .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,21,%,0,把百分数化成小数，只要把百分号去掉，同时把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.,今天我学习了百分数和小数的 互化，我能算： 1、小数化成百分数。 0.7( )% 5（ ）% 1.08( )% 0.305( )%,70,500
7、,108,30.5,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,2、百分数化成小数或整数。 150%（ ） 500%（ ） 0.4%（ ） 1.75%（ ）,1.5,5,0.004,0.0175,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose
8、 Pty Ltd.,3,0.75,0.167,1.6,75%,16.7%,160%,小数,分数,百分数,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,把分数化成百分数，通常先把分数化成小数（除不尽时，通常保留三位小数），再把小数化成百分数。,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copy
9、right 2004-2011 Aspose Pty Ltd.,4,把17%、40%、12.5%化成分数。,17%,40%,12.5%,百分数,分母是100的分数,最简分数,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,把百分数化成分数，先把百分数改 写成分数，能约分的要约成最简分数。,Evaluation only. Created with Aspose.Slides for .NET 3.5 Clien
10、t Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,2、百分数化成分数。 62.5%（ ） 0.25%（ ） 8%（ ） 72%（ ）,37.5,140,14.3,2,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,先化成小数再化成百分数,用分子除以分母就可以完成,Evaluation only. Created with Aspose.Slides f
11、or .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,努力吧！,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,下面的正方形表示“1”，把各图中阴影部分按要求表示出来。,用小数表示（ ） 用分数表示（ ） 用百分数表示（ ）,9%,0.09,用小数表示（ ） 用分数表示（ ） 用百分数表示（ ）,55%,0.55,Eval
12、uation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,按由小到大的顺序排列下列各数。,0.541,0.054,0.504,3.9%,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,A：一位小数,B：两位小数,C：三位小数,A,Evaluati
13、on only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,A：向左,B：向右,C：一位,A,把 6.4%化成小数，先把百分号去掉，然后把6.4的小数点（ ）移动（ ）。,D,D：两位,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,B,在一个自然数（0除
14、外）后面添上一个“%”，这个自然数就（ ）。,选一选,A：扩大100倍,B：缩小100倍,C：减少100倍,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,填表,60%,0.55,0.375,37.5%,125%,0.667,66.7%,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,
