北师大版五年级数学下册《练习二》课件15391资料讲解.ppt

北师大版五年级数学下册,练 习 二,岭门镇新丰小学,梁荣森,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,(1)图,和图,分别是什么图形？,(2)下面分别是图,和图,的展开图，请根据原图涂上颜色并标 出每个面的长和宽。,图是正方体，图是长方体。,10,10,10,10,10,10,20,20,10,10,20,20,6,6,10,10,6,6,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,(3)图,的棱长总和是多少？,图,的表面积是多少？,1012120,(,cm,),图的棱长总和：,图的表面积：,(,2010206106,),2760,(,cm,2,),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.,3.(,404040254025)27200,(,cm,2,),4.,13,个,。,2020135200,(,cm,2,),Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,拼成的长方体比5个正方体少了8个面，,不相等,。,1010653000,(,cm,2,),5个正方体表面积之和：,101065101082200,(,cm,2,),5个正方体表面积之和：,105104,101022200,(,cm,2,),或,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,53.5,(,3.51.551.5)243,(,dm,2,),只要计算5个面的面积和。,答：至少需要43dm,2,的材料。,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,序号,图形名称,长/cm,宽/cm,高/cm,1,正方体,15,15,15,2,长方体,15,10,10,3,长方体,15,10,8,4,长方体,15,15,10,5,长方体,15,15,8,6,长方体,10,10,8,Evaluation only.,Created with Aspose.Slides for.NET 3.5 Client Profile 5.2.0.0.,Copyright 2004-2011 Aspose Pty Ltd.,1521028425107,(,cm,),1.07,(,m,),捆扎一个礼盒需要绳子的长度：,1.0799.63,(,m,),捆扎9个礼盒需要绳子的长度：,最多可以捆扎9个。,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.,