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1、笔算除法青岛版数学三年级下册 农田里的数学农田里的数学信息窗信息窗3 3 除数接近整十数的两位数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.双埠小学口算抢答（看谁算得准，说得快） 12
2、 5= 25 4= 25 8= 12 11= 9 80= 80 7= 60 8= 15 5= 210 3= 27 30=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.双埠小学应用竖式计算
3、下列各题 65050= 81590= 53240= 84180=如果除数不是整十数又该怎样算呢？Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.双埠小学笔算除法除数接近整十数的两位数“四舍
4、五入四舍五入” ”试商方法试商方法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.Evaluation only.Evaluation only. Created with Aspose.
5、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.双埠小学你能提出哪些探究问题1、平均每公顷玉米施肥多少吨？ 2、采用喷灌的方式，平均每公顷用水多少吨？ 3、采用滴灌的方式，平均每公顷用水多少吨？Evaluation only.Evaluation only. Created with Aspo
6、se.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.双埠小学请同学们阅读课本P89P90 1.课本上进行计算时，用了几种方法？ 2.进行竖式计算时，除数不是整十时，课 本是怎么办的？ 3.试商计算时，我们应注意什么问题？ 4找到商之后，我们还必须做什么？Evaluation only.Eva
7、luation 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.你会算吗？626 =372 37262=6竖式笔算。 平均每公顷玉米施肥多少吨 ？ 37262= （吨） 答： Evaluation only.Evaluation only.
8、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.6用竖式算一算:可以把“62” 看作“60”来 试商。0660平均每公顷玉米施肥6吨。答： 37262= （吨） 3 7 2十3 7 2)62百个 表示6个62表示662=372Evaluation onl
9、y.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.双埠小学 6 2 6我来验算 3 7 2Evaluation only.Evaluation only. Created with Aspose.Slides for
10、.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. 大胆尝试： 小明家种了43平方米玉米，共施肥387千克，他 平均每平方米施肥多少千克？)3 8 74393 8 7038743= (千克）答：平均每平方米施肥9千克。9Evaluation only.Evaluation only. Created with Asp
11、ose.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.采用喷灌的方式，平均每公顷用水多少吨 ？Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Cre
12、ated 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.20 把17看作“20” ，商是4。)8 5 017 6 84商4小了， 改商5。50答：采用喷灌的方式，平均每公顷用水50吨 。5085017= （ ）吨8 5 1 70Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Pro
13、file 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.双埠小学203、采用滴灌的方式，平均每公顷用水多少吨？32317= （吨）)3 2 3172011 7 1 5 391 5 3019答：采用滴灌的方式，平均每公顷用水19吨.Evaluation only.Evaluation only. Created with Aspose.Slides for .N
14、ET 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.商6小了， 改商7。1.( )里最大能填几？30( ) 87 40( ) 90 60( ) 13542( ) 88 28( ) 134 97( ) 578222245)301 9 227 1 6 263 0 ( )805 7 678 5 6 071 6 ( )商应乘实际
15、的除数)309 3 031 9 3 3 00 ( )2.火眼金星辨对错，错的改正效果检测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.双埠小学3、判断商是几位数。 19623= 47222= 49212= 17611=商是一位数商是两位数商是两位数商是两位数Evaluation only.Evaluation only. Created with Aspose.Slides f
