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一年级数学下册拔萝卜4教学课件北师大版.ppt

一年级数学下册拔萝卜4教学课件北师大版.ppt

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一年级数学下册拔萝卜4教学课件北师大版

教学目标 1.让同学们在具体的情境中,进一步体会进位加法的意义,感受数的加法计算与生活的联系。 2.探索并掌握两位数加两位数进位加法的计算方法,并能正确计算。 * 北师大版一年级数学下册 拔萝卜 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. 我拔了38个萝卜 我拔了26个萝卜 请你提出问题? Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 我拔了38个萝卜 我拔了26个萝卜 白兔比黑兔少拔了几个萝卜? Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 我拔了38个萝卜 我拔了26个萝卜 黑兔比白兔多拔了几个萝卜? Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 我拔了38个萝卜 我拔了26个萝卜 一共拔了多少个萝卜? 38 + 26 = 64 (个) Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 小强 小东 38+26=64 你是怎么算的? 小红 小花 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 30+20=50 8+6=14 38+26=64 38+26= 30 8 20 6 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 30+20=50 8+6=14 38+26=64 50+14=64 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 38+26=64 38+20=58 58+6=64 20 6 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 38+26=64 30 8 30+26=56 56+8=64 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 38+26=64 40+26=66 66 - 2=64 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 38+26=64 可以列竖式 3 8 2 6 + 数位要对齐: 个位对准个位 十位对准十位 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.

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