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时间:2020-04-05
《人教新课标数学五年级上册第五单元(平行四边形的面积)PPT课件.ppt》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、平行四边形的面积人教新课标五年级数学上册Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0
2、.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5Clie
3、ntProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.高底宽长平行四边形底高面积长方形长宽面积6米4米24平方米6米4米24平方米(一个方格代表1m2,不满一格的都按半格计算)Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright
4、2004-2011AsposePtyLtd.1.利用你手中的学具,剪一剪、拼一拼,试把平行四边形转化为长方形。2.观察拼出的长方形和原来的平行四边形,你发现了什么?3.由长方形的面积=长×宽,你发现平行四边形面积的计算方法是什么?自探提示Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0
5、.Copyright2004-2011AsposePtyLtd.高底宽长平行四边形面积的计算结论:平行四边形转化成了长方形所以:平行四边形的面积=底×高因为:长方形的面积=长×宽平行四边形可以转化成一个长方形,长方形的面积与原来平行四边形的面积___。长方形的长与原来平行四边形的底___。长方形的宽与原来平行四边形的高___。相等相等相等Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.Cre
6、atedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.S=ahahsEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyL
7、td.沿平行四边形的任意一条高剪开、平移,都可以得到长方形。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.Evaluationonly.CreatedwithAspose.S
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