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1、人教版五年级数学上册第四单元人教版五年级数学上册第四单元Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2019-2019 Aspose Pty Ltd.预备题妈妈买了苹果和梨各妈妈买了苹果和梨各2kg2kg，知梨每千克，知梨每千克2.82.8元，元，苹果每千克苹果每千克2.42.4元，妈妈一共要付多少钱元，妈妈一共要付多少钱? ?苹果苹果总价价+梨的梨的总价价=总钱数数(苹果的苹果的单价价+梨的梨的单价价) 2=总钱数数Evaluation only.Create
2、d with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2019-2019 Aspose Pty Ltd.2共共10.4元元苹果和梨苹果和梨各要各要2Kg苹果每千克多少苹果每千克多少钱？Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2019-2019 Aspose Pty Ltd.元。元。解：解：设苹果每千克苹果每千克总钱数数 = = 梨的梨的总价价 + + 苹果的苹果的总价价本人解答。
3、本人解答。 2+2.82=10.4 2+5.6=10.4 5.65.6 =10.42+5.6 2=4.8 22=4.82 =2.4 元。元。2 .42 .4答：苹果每千克答：苹果每千克Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2019-2019 Aspose Pty Ltd.也可以也可以这样想：想：总钱数数 2 = 2 = 两种水果的两种水果的单价价总和和 (+2.8)2=10.4(+2.8)22=10.42 +2.8=5.2请他本人把这个方请他本人把这个方程
4、解完。程解完。 元。元。2 .42 .4答：苹果每千克答：苹果每千克+2.82.8=5.22.8 =2.4 Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2019-2019 Aspose Pty Ltd.他会解以下方程他会解以下方程吗?5+ 1.55 = 17.5(3 ) 2 = 8.5Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2
5、019-2019 Aspose Pty Ltd.练习练习 两辆汽车同时从相距两辆汽车同时从相距237千米的两个车千米的两个车站相向开出，经过站相向开出，经过3小时辆车相遇。一辆汽车小时辆车相遇。一辆汽车每小时行每小时行38千米，另一辆汽车每小时行多少千米，另一辆汽车每小时行多少千米？千米？Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2019-2019 Aspose Pty Ltd.他能根据他能根据给出的方程出的方程编运用运用题吗?(26+) 3=150Evalu
6、ation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2019-2019 Aspose Pty Ltd.Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2019-2019 Aspose Pty Ltd.224=11或242=11Evaluation only.Created with Aspose.Slides for .NET 3.5 Client P
7、rofile 5.2.0.0.Copyright 2019-2019 Aspose Pty Ltd.Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2019-2019 Aspose Pty Ltd.列方程解运用题的普通步骤列方程解运用题的普通步骤1 1设未知数；未知数；2 2找数量关系；找数量关系；3 3列方程；列方程；4 4解方程；解方程；5 5检验, ,写答写答语。Evaluation only.Created with Aspose.Slides for .N
8、ET 3.5 Client Profile 5.2.0.0.Copyright 2019-2019 Aspose Pty Ltd.17.54X3X作业：根据图意列方程并解作业：根据图意列方程并解方程。方程。Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2019-2019 Aspose Pty Ltd.Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2019-2019 Aspose Pty Ltd.
