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1、分数四则混合运算 简便运算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.概念回忆:1、分数乘法的计算法则是什么 ？ 2、分数除法的计算法则是什么 ？ 3、什么叫互为倒数？Evaluati
2、on 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.4.说一说分数四则混合运 算的运算顺序.5.举例说明整数四则运算 律对分数四则运算同样适 用.Evaluation only.Evaluation only
3、. 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.分数乘法的计算法则：分数和分数相乘，用分子 相乘的积作分子，分母相乘 的积作分母。Evaluation only.Evaluation only. Created with Aspose.Slides
4、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.分数除法的计算法则：甲数除以乙数（0除 外），等于甲数乘乙数 的倒数。Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0
5、.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.什么叫互为倒数？乘积是1的两个数互 为倒数。1的倒数是1，0没有倒数 。Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .N
6、ET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.判断：（1）1的倒数是1。 0的倒数是0 。 （2）所有的数都有倒数。 （3）a的倒数是 . （4）真分数的倒数大于1。 （5）假分数的倒数小于1。 （6）因为0.52=1 ，所以0.5和 2互为倒数。Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Cr
7、eated 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.7、甲数除以乙数，等于甲数乘乙 数的倒数。8、一个不等于0的数乘一个真分数 ，积一定比原来的数小。9、如果M、N互为倒数，那么也互为倒数。Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Cre
8、ated 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.10、如果A的 等于B的 ，那 么A、B互为倒数。11、整数四则混合运算的运算顺 序，对于分数四则混合运算的运 算顺序相同。12、四分音符表示的时值是全 音符的Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5
9、.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.用方框图表示：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
10、.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.（一）填空： （1）.在整数、小数、分数的四则混合 运算中,( )是第一级运算,( )是第二级 运算.（2）.没有括号的算式里,如果只含有 同一级运算的运算顺序是( ）； 如果含有两级运算应先算（ ）， 再算（ ）。（）.在有括号的算式里，要先算（ ），再算（ ）。Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5
11、.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.2、（ ）的倒数是它本身。（ ）没有倒数。是因为( )3、0.5的倒数是( ).的倒数是( ).2 的倒数是( )Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Create
12、d 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.4、两根同样长的钢管，第一根用 去 米，第二根用去 ，哪一 根用去的多些？5、 a=b1 = c（a、 b、c不等于0） 请将a、b、c三个数按照从大到 小的顺序排列是：（ ）Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Prof
13、ile 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.6、最小素数的倒数与最小合数 的和是（ ）7、20以内的素数中，倒数最小 的是（ ）。8、一个小数，整数部分和小数 部分互为倒数，已知整数部分是 4，这个小数是（ ）。Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3
14、.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.千克黄豆做 千克豆腐（1） 千克黄豆做（ ）千克豆 腐（2） 做 千克豆腐需（ ）千 克黄豆Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.
15、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.2、按要求改变运算顺序。（1）先除后乘再加，算式为（ ） （2）先加后乘再除，算式为（ ） Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Sl
16、ides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.3、脱式计算。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.简便计算 ：Evaluation
