冀教版五年级数学下册分数除法.pptx

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.一个数除以整数，等于这一个数除以整数，等于这个数乘整数的倒数个数乘整数的倒数Evaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.妈妈买来 张大饼，把它平均分成3 份，每份是这张大饼的几分之几？把 张大饼平均分成3份，就是把一张大饼平均分成 份，每份是求每份是多少，就是求 的 是多少，用乘法Evaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.一个数除以一个数除以整数整数（0 0除外）等于除外）等于 这个数乘整数的这个数乘整数的倒数倒数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.例例 把把2升消毒液倒入可装升消毒液倒入可装 消毒液消毒液的瓶子中，至少需要几个瓶子？的瓶子中，至少需要几个瓶子？Evaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.把把 升和升和 升都化成毫升，升都化成毫升，用除法计算用除法计算2升=2000毫升升=400毫升 2000400=5（个）列出除法算式列出除法算式 ，用用2 2乘乘 的倒数的倒数 （个）（个）一个数除以一个数除以分数分数，等于这个数乘分数，等于这个数乘分数的的倒数倒数Evaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.解：设至少需要解：设至少需要x个瓶子个瓶子答：至少需要答：至少需要5 5个瓶子个瓶子Evaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.（2）把）把 升消毒液倒入同样的瓶子中，升消毒液倒入同样的瓶子中，至至 少需要几个瓶子？少需要几个瓶子？（个个）列方程解答列方程解答解：设至少需要解：设至少需要x个瓶子个瓶子答：至少需要答：至少需要3个瓶子个瓶子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.Evaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.本课小结本课小结同学们，今天你们有什么同学们，今天你们有什么收获？收获？Evaluation only.Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.