初一整式除法练习题

2018-10-16试题

  参考练习

  (1)6x2÷(-2x)=_________.

  (2)8x6y4z÷_______=4x2y2.

  (3)(xy2-4x3y2)÷(-2xy2)=_______.

  (4)(5a3b2+10a2b3)÷________=a+2b.

  (5)()÷(3a2b3)=2a3b2-a2b+3.

  (6)[6a2b2+________+________]÷________=3a+b-1.

  2.选择题

  (1)下列计算,结果正确的是()

  A.8x6÷2x2=4x3B.10x6÷5x3=x3

  C.(-2x2y2)3÷(-xy)3=-2x3y3D.(-xy2)2÷(-x2y)=-y3

  (2)若xmyn÷x3y=4x2则()

  A.m=6,n=1B.m=5,n=1

  C.m=5,n=0D.m=6,n=0

  (3)计算正确的是()

  A.(9x4y3-12x3y4)÷3x3y2=3xy-4xy2

  B.(28a3-14a2+7a)÷7a=4a2-2a+7a

  C.(-4a3+12a2b-7a3b2)÷(-4a2)=a-3b+ab2

  D.(25x2+15x2y-20x4)÷(-5x2)=-5-3xy+4x2

  3.计算

  (1)(102)3×104÷(-103)3.

  (2)[(x+y)(x-y)-(x-y)2+2y(x-y)]÷4y.

  答案:

  1.(1)-3x(2)2x4y2z(3)-+2x2(4)5a2b2(5)6a5b5-3a4b4+9a2b3

  (6)2ab3,-2ab2,2ab2

  2.(1)D(2)B(3)C

  3.(1)-10(2)x-y

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