苏教版三年级上册数学(认识周长）公开课课件PPT 11页

'认识周长苏教版三年级数学上册绿色圃中小学教育网http://www.lspjy.comEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.绿色圃中小学教育网http://www.lspjy.com 学习目标1.通过观察和操作等活动，认识周长的含义，会指出并能测量简单图形的周长。2.能利用对图形周长的认识计算一些平面图形的周长。3.通过观察、测量和计算等活动，在获得直观经验的同时发展空间观念。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.绿色圃中小学教育网http://www.lspjy.com Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.绿色圃中小学教育网http://www.lspjy.com Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.绿色圃中小学教育网http://www.lspjy.com 银杏叶的周长枫叶的周长Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.绿色圃中小学教育网http://www.lspjy.com Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.绿色圃中小学教育网http://www.lspjy.com 第一关：量一量、算一算下面图形的周长。6厘米3厘米4厘米2厘米2厘米3厘米3厘米1厘米3厘米2厘米2厘米6＋3＋4＝13（厘米）答：三角形的周长是13厘米。2＋2＋3＋3＝10（厘米）答：长方形的周长是10厘米。2＋2＋1＋3＝8（厘米）答：这个四边形的周长是8厘米。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.绿色圃中小学教育网http://www.lspjy.com （1）第二关：这两个图形的周长一样吗？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.绿色圃中小学教育网http://www.lspjy.com （2）第三关：这两个图形的周长一样吗？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.绿色圃中小学教育网http://www.lspjy.com 总结通过本课的学习，认识周长的含义，会指出并能测量简单图形的周长。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.绿色圃中小学教育网http://www.lspjy.com 再　见Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.绿色圃中小学教育网http://www.lspjy.com'