2016分数乘法ppt.ppt

教学目标 1.知识目标：引导大家根据需要解决的实际问题，理解：把一个分数平均分成几份，求每份是多少用除法计算的算理。 2.能力目标：使同学们经历探究分数除以整数的计算过程，掌握分数除以整数的计算方法。 3.情感目标：培养大家勤于动手动脑的良好习惯。 本课小结探究分数除以整数的计算过程，掌握分数除以整数的计算方法。 * * 人教版六年级数学上册 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. 复习 １.口答：5个12是多少？怎样列式？ ２.计算：① ＋　＋②　＋　＋ ３.思考题：100个　　相加是多少？ 1|6 2|6 3|6 3|10 3|10 3|10 3|10 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 　　小新、爸爸、妈妈一起吃一块蛋糕， 每人吃　　块，３人一共吃多少块？ 2|9 例１ Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 例１ Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 例１ 小新 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 例１ 小新 爸爸 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 例１ 一共吃了多少块？ 小新 爸爸 妈妈 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 例１ 　　小新、爸爸、妈妈一起吃一块蛋糕， 每人吃　　块，３人一共吃多少块？ 2|9 一共吃了3个 块？ Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. １.　　? 3表示什么？ ２.与加法算式相比较，　表示什么？3表示什么？ ３.与12 ?5的意义相比较你会发现什么？ 2|9 2|9 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. 　　分数乘整数的意义与整数乘法的意义相同，就是求几个相同加数的和的简便运算。 意义 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 巩固练习 1.计算：② ＋ 　＋ 2.思考题：100个　　相加是多少？ 3|10 3|10 3|10 3|10 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 　　分数乘整数，用分数的分子和整数相乘