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1、人教版五年级上册数学人教版五年级上册数学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.Evaluation only.Created with Aspose.Slides for .NET
2、3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.天平是平衡的继续Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.20305020 +30 =50Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 A
3、spose Pty Ltd.20+30=5020+X=100方程的意义方程的意义Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.3x=186 Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.小芳小芳小军小军我拍了我拍了25下下我拍了我拍了下
4、下小芳和小军一小芳和小军一共拍了共拍了70下下25+x=70Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.像20+x=100、3x=186、25+x=70这种含有 未知数的 等式 叫方程。Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.练
5、习：下面哪些是方程？哪些不是方程？ 35- =12 ( ) 0.49 =7 ( ) Y+24 ( ) 35+65=100 ( ) 5 +32=47 ( ) -14 72 ( ) 28 16+14 ( ) 9b-3=60 ( ) 6(a+2)=42 ( ) +y=70 ( ) 910Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.张强也列了两个式子，不小心被墨水弄脏张强也列了两个式子，不小心被墨水弄脏了。猜猜他原来列的
6、是不是方程？了。猜猜他原来列的是不是方程？（1） 6X + =78 （2） 36 + =42 Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd. “方程一定是等式，等式也一定是方方程一定是等式，等式也一定是方程程” 这句话对吗？这句话对吗？你能用自己的方式表示方程和等式之你能用自己的方式表示方程和等式之间的关系吗？间的关系吗？Evaluation only.Created with Aspose.Slides for
7、.NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd. 方程与等式之间方程与等式之间 的关系的关系等 式方程Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.考考你：下面哪些是方程，哪些不是方程？为什么？下面哪些是方程，哪些不是方程？为什么？4+3x=10 6+2x 7-x3 17-8=9 8x=0 18 x=2方程一定是等式；但等式不一定
8、是方程。Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.看图列式。X73166X + 73 = 1662X+200 = 2000X毫升毫升 X毫升毫升200毫升毫升2000毫升毫升Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd. 一辆公共汽
9、车原有一辆公共汽车原有X人，人，到站后，有到站后，有5人下车，人下车，8人人上车，这时车上有上车，这时车上有22人。人。Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd. 通过这一节课的学通过这一节课的学习，你有哪些收获？习，你有哪些收获？Evaluation only.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Copyright 2004-2011 Aspose Pty Ltd.
