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1、圆的有关公式,1.圆的周长 2.弧长,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,3.圆的面积 4.扇形的面积,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,5.圆环的面积 6.扇环的面积,Evaluation only.
2、 Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,总结：,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,扇形的周长=,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile
3、 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,变化规律：,1.圆心角n不变时：r扩大 m倍，C扩大 倍； S扩大 倍。 2.半径r不变时：n扩大m倍，l扩大 倍； 扩大 倍。 3.圆心角和半径同时变化时,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,动手画图探究题,1.羊吃草问题（求面积） 2.点的运动轨迹（求弧长）,Evaluation only. Create
4、d with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,1.如果圆环的外圆周长C1=250cm， 内圆周长C2=150cm，求圆环的宽度d（结果精确到0.1cm）,基本题型,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,2.求阴影部分的周长和面积,单位：米,Evaluation
5、only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,扇形统计图（部分与整体的关系）,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,被除数，除数 （倍数 因数） 分子，分母 比的前项，比的后项,概念类比：1. 除法， 分数， 比,Evaluation o
6、nly. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,对比：,2.分数的基本性质 比的基本性质 化简比与求比值 比例的基本性质（比例式 等积式）,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,3.除尽与整除 4.分数，小数，百分数（互相转化） 5.真分数，
7、假分数（大于或者等于1），带分数 6.最简分数 ， 最简整数比 7.通分(比较大小，加减法） 约分（乘除法，化简）,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,8.正整数的几种分类 正偶数，正奇数 素数，合数，1 9.最小的自然数 最小的正整数，素数，合数,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.
8、0.0. Copyright 2004-2011 Aspose Pty Ltd.,10.因数，素因数 ，分解素因数 11.被2，5整除的数的特征 能化为有限小数的分数的特征 12.循环小数，循环节 13.比例中项，第四比例项,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,保留 保留0.01 保留0.1% 一成 1个百分点 八折,Evaluation only. Created with Aspose.Slid
9、es for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,12的 是 ？,的 是 12。,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,3个 等于 个,1个蛋糕的 相当于同样大小6个蛋糕的 。,Evaluation only. Created with Aspose.Slides for .NET 3.5 Clien
10、t Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,1.2小时= 分钟 1小时20分钟= 小时,比较,1米= 厘米 1平方米= 平方厘米,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,研究对象：两个数以上,最大公因数，最小公倍数（短除法） 互素 倒数 通分 比，三连比， 比例尺（单位换算），比例,Evaluation only. Created wit
11、h Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,数形结合,1.数轴。 2.分数意义。 3.分数乘法的意义。,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,计算题类型,1.加减乘除混合运算（化为分数，化为乘法） 2.解方程（比例），用比例方法解应用题 3.求三连比（中间比） 4.图形
12、周长面积计算 （割补法） 5. 求P(A).（枚举法）,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,生活中的问题：应用题公式,1. 求最大公因数或者最小公倍数 2.求“ 某某 ”率： 及格率，合格率， 出勤率，增产率 增长率（降低率）问题,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copy
13、right 2004-2011 Aspose Pty Ltd.,3.买卖问题（盈利率）公式 成本 X（1+盈利率）=售价 或（1-亏损率） 原价 X 折率=折后售价,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,4.银行问题（利率）公式 利息=本金 X 利率 X 期数 税后利息=利息 X（1-税率）,Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.,
