《分数与除法课件(北师大版五年级数学上册课件)》由会员分享，可在线阅读，更多相关《分数与除法课件(北师大版五年级数学上册课件)（15页珍藏版）》请在金锄头文库上搜索。
1、分数与除法北师大版五年级数学上册Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.课前复习判断:(1)假分数都大于1( )(2)带分数都比假分数大( )(3)小于 的真分数只有Evaluat
2、ion only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.把一块蛋糕平均分给2个小朋友,每人可以 分到几块蛋糕?如果把7块蛋糕平均分给3 个小朋友呢?Evaluation only.Evaluation only
3、. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.观察与交流12=73=被除数除数=Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Prof
4、ile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.怎样把 化成带分数?=分子分母=分子 分母余数 分母商Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for
5、.NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.怎样把 化成假分数.2分子分母整数=整数X分母+分子分母Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright
6、 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.1、能找出下面每句话中的单位“1”吗？试一 试： （1）、小青课外书的数量是小亮课外书的2/3 ； （2）、五年级数学组的老师是全校老师的 8/127。 2、说说下面分数的意义： （1）、我国人口约占世界人口的1/5； （2）、人的血液约占体重的1/13；Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with As
7、pose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.3、列式计算： （1）、把48棵树苗平均分给8个小组栽 ，每组栽多少棵？ （2）、8米长的钢管平均分成2段，每 段长多少米？把一个数平均分成几份，求 每一份是多少，用除法。Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0
8、.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.舞台前面的边长为4米，把它平均分 成5份，便于摆花盆，每份的长度是 多少米？把每1米平均分成5份，1份是1/5 米；4个1/5米就是4/5米。 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0
9、.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.先填表，再说一说你发现了什么？先用 除法表示，再用分数表示： （1）、把1千克大米平均分成3份，每份 有多少千克？ （2）、把3块饼平均分成4个同学，每个 同学分得多少块？Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Clie
10、nt Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.把3块饼平均分给4位同学，每个 同学分得多少块？34 （块）的意义是：把 （ ）平均分成4份，表示这样的（ ）份的数。 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile
11、 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.把3块饼平均分给4位同学，每个 同学分得多少块？34 （块）的意义是：把 （ ）平均分成4份，表示这样的（ ）份的数。单位 “1”3 1 3Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile
12、 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.分数与除法的联系与区别:联联系区别别分数分 子分 数 线线分 母分数是一个 数可以看作 两个数相除 除法 被 除 数除 号除 数除法是一种 运算Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profi
13、le 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.3、列式计算： （1）把5米的铁丝平均分7份，每份长 多少米？（2）小王骑自行车5分行了1千米 ，平均每分行多少千米？Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.
14、Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.这节课，我们学习了这节课，我们学习了 分数与除法的关系，分数与除法的关系，你能说一说你有哪些你能说一说你有哪些 感受或收获吗？感受或收获吗？Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.
