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1、西师大版五年级数学上册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.工人叔叔铺一条182.4m长的天 然气管道，一共铺了12天，平均每 天铺多少米？182.412=15.2（米）答:平均
2、每天铺15.2米。铺设的总米数 铺设的总天数 = 平均每天铺的米数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.有3430箱货物每辆车装125箱 。343012528进一法要装多少辆车？
3、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.前4天铺设了49.6米后8天铺设了132.8米例2 平均每天铺设多少米天然气管道?用铺设管道的总米 数除以铺设的天数,就是 平均每天铺的米数
4、。 列成综合算式：铺设的总米数 铺设的总天数 = 平均每天铺的米数(49.6 +132.8 ) ( 4 + 8) = 182.4 12 = 15.2（米） 答:平均每天铺设15.2米._?_?（1）铺设的总米数 ： （2）铺设的总天数 ： （3）平均每天铺的米数 ：49.6 +132.8=182.4（米 ） 4+8=12（天）182.4 12 =15.2（米）Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Sli
5、des for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.例题：铺设管道的总米数 铺设天数 平均每天铺设的米数 前4天的米数+后8天的米数 4天+8天 复习题：铺设管道的总米数铺设天数 平均每天铺设米数Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.S
6、lides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.1 甲乙两地相距240千米,一辆汽车从甲地开往乙地用了4小 时,返回甲地用了5小时.求这辆汽车往返的平均速度。2 王阿姨上午卖了8件童装,下午卖了9件,一共卖了826.2元. 平均每件童装卖多少元?下列各题只列式不计算。2402 ( 4 + 5 )826.2( 8 + 9 )Evaluation only.Evaluation only. Created with Asp
7、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.例3 买蘑菇. 我这里还有12千 克蘑菇,52元就全 部卖给你.这里还剩6千克 蘑菇,27元就全 部卖给你.如果两个菜贩的蘑菇质量是一样的,哪个的更优惠?用每千克蘑菇的价格进行比较.叔叔:276=4.5元阿姨:52124.3元答: 因为4
8、.54.3 , 所以阿姨卖得更优惠。议一议还可以怎样想？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.用千克蘑菇的价格比较：重量钱数叔叔阿姨62=12(千克) 272=54元 12千克
9、52元 答: 因为5452 ,所以阿姨卖得更优惠.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.小红家在8.5的土地上收了83.3千克白菜 ，小林家在25.5的土地上收了242.3千克白
10、菜 。哪家白菜的收成好一些？ 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.这节课学习的是什么内容？ 你有哪些收获？Evaluation only.Evaluation only. Cr
11、eated 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.小明从家去新华书店买书，去时每分钟 走30米，返回时每分钟走40米。他往返一 次平均每分钟走多少米？(小明家到新华书 店120米)Evaluation only.Evaluation only. Created
12、 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.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.
