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歡迎您訪問數學考題練習:下列計算結果正確的是!

數學考題練習:下列計算結果正確的是

更新時間:2024-01-12 16:29:54作者:貝語網校

下列計算結果正確的是

A.3x2y-5xy2=-2x2y

B.-22x3y3-2xy=2x3y3

C.28x4y2÷7x3y=4xy

D.x4+x4=2x8

試題答案

C

試題解析

利用整式的除法及合并同類項的法則進行計算即可得到正確的結果.

解答:A、3x2y與5xy2不是同類項,不能合并;

B、-22x3y3、2xy不是同類項,不能合并;

C、28x4y2÷7x3y=(28÷7)(x4y2÷x3y)=4xy,本答案正確;

D、x4+x4=2x4,故本答案錯誤;

故選C.

點評:本題考查了整式的除法及合并同類項,屬于基礎運算,要求必須掌握.

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