小学、初中、高中各种试卷真题知识归纳等免费下载www.doc985.com一、选择题1.(2a3b2-10a4c)÷2a3等于()A.a6b2cB.a5b2cC.b2-5acD.b4c-a4c2.(x4y3+x3yz)÷x3y等于()A.x4y3+xzB.y3+x3yC.x14y4D.xy2+z3.(x17y+x14z)÷(-x7)2等于()A.x3y+zB.-xy3+zC.-x17y+zD.xy+z4.(612b2-612ac)÷[(-6)3]4等于()A.b2-b2cB.a5-b2cC.b2-acD.b4c-a4c5.(8x6y+8x3z)÷(2x)3等于()A.x6y+x14zB.-x6y+x3yzC.x3y+zD.x6y+x3yz6.(4x2y4+4x2z)÷(2x)2等于()A.4y4+zB.-y4+zC.y4+x2zD.y4+z7.(x7y4+x7z)÷x7等于()A.y4+zB.-4x2y4+xzC.x2y4+x2zD.x2y4+z8.(x3y2+x2z)÷x2等于()A.xy+xzB.-x2y4+x2zC.xy2+zD.xy4+x2z9.(-5a4c-5ab2c)÷(-5ac)等于()A.-a6b2-cB.a5-b2cC.a3b2-a4cD.a3+b210.(x2y2+y7+y5z)÷y2等于()A.x2+y5+y3zB.x2y2+y5zC.x2y+y5zD.x2y2+y7+y5z11.(2a4+2b5a2)÷a2等于()A.a2c+b5cB.2a2+2b5C.a4+b5D.2a4+ba2二、填空题12.(5x3y2+5x2z)÷5x2等于;13.(2a3b2+8a2c)÷2a2等于;14.(6a3b2+14a2c)÷a2等于;15.(-6a3-6a2c)÷(-2a2)等于;16.(-12x3-4x2)÷(-4x2)等于;三、计算题17.(2a4-6a2+4a)÷2a18.(3a3b2+3a2b3-3a2b2)÷3ab19.(x2y3-9xy5+8y2)÷y2小学、初中、高中各种试卷真题知识归纳等免费下载www.doc985.com答案:1.C2.D3.A4.C5.C6.D7.A8.C9.D10.A11.B12.xy2+z13.ab2+4c14.6ab2+14c15.3a+3c16.3x+117.解:(2a4-6a2+4a)÷2a=2a4÷2a-6a2÷2a+4a÷2a=a3-3a+218解:(3a3b2+3a2b3-3a2b2)÷3ab=3a3b2÷3ab+3a2b3÷3ab-3a2b2÷3ab=a2b+ab2-ab19.解:(x2y3-9xy5+8y2)÷y2=x2y3÷y2-9xy5÷y2+8y2÷y2=x2y3-2-9xy5-2+8y2-2=x2y-9xy3+8