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1、初中數(shù)學、數(shù)學試卷、初中數(shù)學試題、數(shù)學學案、數(shù)學初中教案、初中數(shù)學練習題、數(shù)學課件、期末考試數(shù)學、數(shù)學知識難點分析5.2分式的乘除法【學習目標】1、經(jīng)歷探索分式的乘除運算法則的過程，并能結合具體情境說明其合理性;2、會進行簡單分式的乘除運算，具有一定的代數(shù)化歸能力；3、能解決一些與分式乘除運算有關的簡單的實際問題?！緦W習方法】引導一一自主探究一一合作交流一一總結應用【學習過程】一、知識回顧：17=4初中數(shù)學、數(shù)學試卷、初中數(shù)學試題、數(shù)學學案、數(shù)學初中教案、初中數(shù)學練習題、數(shù)學課件、期末考試數(shù)學、數(shù)學知識難點分析初中數(shù)學、數(shù)學試卷、初中數(shù)學試題、數(shù)學學案、數(shù)學初中教案、初中數(shù)學練習題、數(shù)學課件、

2、期末考試數(shù)學、數(shù)學知識難點分析初中數(shù)學、數(shù)學試卷、初中數(shù)學試題、數(shù)學學案、數(shù)學初中教案、初中數(shù)學練習題、數(shù)學課件、期末考試數(shù)學、數(shù)學知識難點分析初中數(shù)學、數(shù)學試卷、初中數(shù)學試題、數(shù)學學案、數(shù)學初中教案、初中數(shù)學練習題、數(shù)學課件、期末考試數(shù)學、數(shù)學知識難點分析、自主學習猜一猜,Sd=?類比分數(shù)的乘除法則你能得出分式的乘除法則嗎?初中數(shù)學、數(shù)學試卷、初中數(shù)學試題、數(shù)學學案、數(shù)學初中教案、初中數(shù)學練習題、數(shù)學課件、期末考試數(shù)學、數(shù)學知識難點分析初中數(shù)學、數(shù)學試卷、初中數(shù)學試題、數(shù)學學案、數(shù)學初中教案、初中數(shù)學練習題、數(shù)學課件、期末考試數(shù)學、數(shù)學知識難點分析初中數(shù)學、數(shù)學試卷、初中數(shù)學試題、數(shù)學學案、

3、數(shù)學初中教案、初中數(shù)學練習題、數(shù)學課件、期末考試數(shù)學、數(shù)學知識難點分析初中數(shù)學、數(shù)學試卷、初中數(shù)學試題、數(shù)學學案、數(shù)學初中教案、初中數(shù)學練習題、數(shù)學課件、期末考試數(shù)學、數(shù)學知識難點分析1、知識點1分式的乘法法則： 2、知識點2分式的除法法則：法則的公式表達:b d=a c初中數(shù)學、數(shù)學試卷、初中數(shù)學試題、數(shù)學學案、數(shù)學初中教案、初中數(shù)學練習題、數(shù)學課件、期末考試數(shù)學、數(shù)學知識難點分析初中數(shù)學、數(shù)學試卷、初中數(shù)學試題、數(shù)學學案、數(shù)學初中教案、初中數(shù)學練習題、數(shù)學課件、期末考試數(shù)學、數(shù)學知識難點分析初中數(shù)學、數(shù)學試卷、初中數(shù)學試題、數(shù)學學案、數(shù)學初中教案、初中數(shù)學練習題、數(shù)學課件、期末考試數(shù)學、數(shù)

4、學知識難點分析初中數(shù)學、數(shù)學試卷、初中數(shù)學試題、數(shù)學學案、數(shù)學初中教案、初中數(shù)學練習題、數(shù)學課件、期末考試數(shù)學、數(shù)學知識難點分析（注意：a、b、c、d可以代表多項式，但 a、c、d不為零）三、合作交流1、例題講解：例1 :計算 1'a2 2a例2:計算21 3xy6y2xa-1-4a 4a2 -1a2 -4初中數(shù)學、數(shù)學試卷、初中數(shù)學試題、數(shù)學學案、數(shù)學初中教案、初中數(shù)學練習題、數(shù)學課件、期末考試數(shù)學、數(shù)學知識難點分析初中數(shù)學、數(shù)學試卷、初中數(shù)學試題、數(shù)學學案、數(shù)學初中教案、初中數(shù)學練習題、數(shù)學課件、期末考試數(shù)學、數(shù)學知識難點分析A級練習：計算22 a-ax+12-y2 2,x +2x

5、 x 44 x 一6x +9 x _3xB級練習:a2 _4a2 6a 9c 18a2b6苛9ab315c22 、x y2z丿8a 3b2 -b10xx 3 x-1x2 -1 x2 -2x -1-3ax4cd初中數(shù)學、數(shù)學試卷、初中數(shù)學試題、數(shù)學學案、數(shù)學初中教案、初中數(shù)學練習題、數(shù)學課件、期末考試數(shù)學、數(shù)學知識難點分析初中數(shù)學、數(shù)學試卷、初中數(shù)學試題、數(shù)學學案、數(shù)學初中教案、初中數(shù)學練習題、數(shù)學課件、期末考試數(shù)學、數(shù)學知識難點分析初中數(shù)學、數(shù)學試卷、初中數(shù)學試題、數(shù)學學案、數(shù)學初中教案、初中數(shù)學練習題、數(shù)學課件、期末考試數(shù)學、數(shù)學知識難點分析初中數(shù)學、數(shù)學試卷、初中數(shù)學試題、數(shù)學學案、數(shù)學初

6、中教案、初中數(shù)學練習題、數(shù)學課件、期末考試數(shù)學、數(shù)學知識難點分析三、課堂小結：分式的乘除法在具體計算過程中，初中數(shù)學、數(shù)學試卷、初中數(shù)學試題、數(shù)學學案、數(shù)學初中教案、初中數(shù)學練習題、數(shù)學課件、期末考試數(shù)學、數(shù)學知識難點分析初中數(shù)學、數(shù)學試卷、初中數(shù)學試題、數(shù)學學案、數(shù)學初中教案、初中數(shù)學練習題、數(shù)學課件、期末考試數(shù)學、數(shù)學知識難點分析1四、當堂檢測1. -翌 < 6ab 的結果是（）A. -8a2b29 22. -3xy如的值等于（）A,3x2yC.18aD.B. 2y2 C.竺D. 2x2y2x3.-15ab16x-3m10xy*5x2y4 -24xy亠5y8x4x2x -64 一 4x x初中數(shù)學、數(shù)學試卷、初中數(shù)學試題、數(shù)學學案、數(shù)學初中教案、初中數(shù)學練習題、數(shù)學課件、期末考試數(shù)學、數(shù)學知識難點分析