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1、两位数乘两位数密州街道花园小学 丁汉友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.教学目标1、在解决具体问题的过程中，学会两位数乘 两位数笔算方法，并能正确计算。 2、经历探索两位数乘
2、两位数计算方法的过程 ，初步培养独立思考和探索问题的意识； 能够运用所学知识，提出并解决简单的实 际问题，体验解决问题策略的多样性。 3、在经历探索算法的过程中，感受乘法运算 在生活中的应用，并有成功的体验。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.C
3、opyright 2004-2011 Aspose Pty Ltd.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.自主学习请同学们认真观察信息窗2。图画呈现城市街心花坛的场景，通过花坛、
4、喷泉及灯柱等景物提 供了丰富的数学信息 。 1、说说看，你找到了哪些数学信息？ 2、根据你找到的数学信息，你能提出哪些数学问题？（至少四个）交流展示1、 “保护环境”花坛每排27盆花，共23排。2、 “美化家园”花坛每排有22盆花，共28排。 3、有30根灯柱需要安装灯泡，买了15箱，每箱12个。4、中心喷泉每行有43个喷头，共23行。Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET
5、 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.小组合作，解决提出的数学问题1、“保护环境”花坛一共用了多少盆花？2723=27 238 15 46 2 1621 （盆） 答： “保护环境”花坛一共用了621盆花。Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Sl
6、ides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.“美化家园”花坛大约用了多少盆花？22 28 （盆）22 2020 28 =56022 28 （盆） 22 2028 3020 30=600600560同学们，你喜欢 那种方法呢？Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Cr
7、eated 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.欢迎光临一套12本， 每本24元 一共要 付多少 钱呢?列式：2412= 怎么算呢？Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for
8、 .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.2 4 1 2同学们能说说竖式 的计算过程吗？84 422 8 82412= 288（元）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
9、5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.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
10、 Pty Ltd.1311 =1432114 =294105+11 =612332=1383221 =6722213= 286看谁摘得快又多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.
11、矿泉水 22箱每箱24瓶一共有多少瓶饮料？（2224=528（瓶）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.这节课同学们有什 么收获呢？Evaluation only.Evaluat
12、ion 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.作业1、课后完成29页自主练习13题。 2、把课本29页自主练习第四题写在作业本上 。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.
