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1、第三章第三章n第十六课第十六课n实际问题一元一次方程（实际问题一元一次方程（4）n1.本课提要本课提要n2.课前小测课前小测n3.典型问题典型问题n4.技能训练技能训练n5.拓展应用拓展应用n6.知识梳理知识梳理n7.本课作业本课作业Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.本课提要本课提要 本节课重点学习利用一元一次方程来解决球赛本节课重点学习利用一元一次方程来解决球赛积分问题，体会用方程解决问题的优越性积分
2、问题，体会用方程解决问题的优越性.技能训练技能训练的题目是练习同学们应用一元一次方程解决实际问的题目是练习同学们应用一元一次方程解决实际问题的能力题的能力,并感受和体会方程在解决实际问题中的作并感受和体会方程在解决实际问题中的作用用;拓展应用中的几个题目重点在于训练同学们应用拓展应用中的几个题目重点在于训练同学们应用知识解决实际问题的意识和能力知识解决实际问题的意识和能力.Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Lt
3、d.课前小测课前小测B ca585亚洲城Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.DEvaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.典型问题典型问题解：设该班胜解：设该班胜x场，则平了场，则平了(7-x)场，于是场，于是 3x+(7-
4、x)=17 x=5答：该班共胜了答：该班共胜了5场。场。Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.解：设成人票解：设成人票x张，则学生票张，则学生票(1200-x)张，有张，有 10x+6(1200-x)=9200 解得解得 x=500, 1200-x=700答：成人票和学生票各售了答：成人票和学生票各售了500张和张和700张。张。Evaluation only.Created with Aspose.Sli
5、des for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.技能训练技能训练 yzc888亚洲城Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.CBEvaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 20
6、04-2011 Aspose Pty Ltd.解：设这个足球队胜解：设这个足球队胜x场，则平了（场，则平了（122x） 场，依题意有场，依题意有 3x+ （122x） +02=22 解得解得 x=6, （122x） =4答：这个足球队胜答：这个足球队胜6场，平了场，平了4 场。场。Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.解：设七年级（解：设七年级（1）班在此轮比赛中共负了）班在此轮比赛中共负了x场场,则则 3
7、(x-1)+1 (x-1)+0x=8 x=3答：七年级（答：七年级（1）班在此轮比赛中共负了）班在此轮比赛中共负了3场。场。Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.拓展应用拓展应用BEvaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.A
8、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.知识梳理知识梳理Evaluation only.Created with Aspose.Slides for .NET 3.5 Client P
9、rofile 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.本课作业本课作业DEvaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.CEvaluation o
10、nly.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.CEvaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.解：设麦蒂两分球投中解：设麦蒂两分球投中x个球，个球， 则罚球投中（则罚球投中（143x）个）个 33+2x+(14-3-x)=28 x=8, (14-3-x)=1答：麦蒂两分球投中答：麦蒂两分球投中8个球，罚球投中个球，罚球投中1个个Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.
