初二数学测试题大全

1、初二数学测试题大全一、判断题。1.()2. x2-y 2()3.()4.()5.3a3x-4b 3y+3b3x-4a 3y (a 3 +b3)(3x-4y) ()6.(x-y) 4+x(y-x) 2+y(y-x) 3 2(x-y)2(x-y+1) ()7.整式和分式统称有理式 . ()8.x2-16y 2-8y-1 (x+4y+1)(x-4y+1) ()9.()10.把一个多项式化成几个整式的积的形式叫做多项式的因式分解. ()11.a 2+2ab+b2(a+b) 2()12.()13.-4x3+8x2-4x -4x(x-1)2()14.()15.()16.甲用x 小时走完s 千米 ,乙比甲早

2、出发a 小时 ,早到b 小时 , 那么乙每小时走千米 .()17.()18.25y2-4a 2-12ab-9b 2 (5y+2a+3b)(5y-2a+3b) ()19.用 A、 B 表示两个整式 ,如果 B 中含有字母 ,式子就叫做分式 . ()20.()21.2a6-32a 2b4 2a2(a 2+4b2)(a+2b)(a-2b) ()22.()23.()24.-x 3y3-x 2y2+xy -xy(x 2y2+xy-1) ()25.-8a3+27b3 -(2a-3b)(4a2+6ab+9b2) ()26.361-(3a+2b)2 (19-3a-2b)(19+3a+2b) ()27.()28

3、.a2+b2-9c 2-1-2ab-6c (a-b-3c-1)(a-b+3c+1)()29.(x+2)(x-3)(x2-7)+(2+x)(3-x)(x+3) (x+2)(x-3)(x2+x-4) ()30.10ab-3+6b-5a (5a+3)(2b-1) ()31.873-76 3 是 11 的倍数 ()32.(m-n)2-2(m 2-n 2)+(m+n) 2 2n2 ()33.2-2a 4 2(1+a 2)(1+a)(1-a) ()34.()35.m2-n 2-m+n(m-n)(m+n-1) ()36.3-2x 2y+xy 2 x(x-y)2 ()37. x)38.当 x -3时 ,()3

4、9.()40. x2-2xy+y2-1 (x-y+1)(x-y-1) ()41.将 a2-b 2+2b-1分解因式得 (a+b-1)(a-b+1) ()42.12x5-24x 3+18x2 6x2(2x 3-4x+3) ()43.()44.()45.2y4z16-1 (5xy 2z4-1)(5xy2z4+1) ()46.25x)47.x2(x+1)-y(xy+x)x(x-y)(x+y+1) ()48.-am-1+14am-49a m+1 -a m-1(1-7a)2()49. ab(x2+1)+x(a 2+b2) (a+bx)(b+ax) ()50.a4-3a 3+3a2-a a(a-1)3 (

5、)51.1-x6 (1-x 3)(1+x3) (1-x)(1+x)(1-x+x2)(1+x+x2) ()52. a9-ab 2 a(a 4+b)(a 4-b) ()53.x3m+3-64y 3 (x m+1-4y)(x2m+2+4xm+1y+16y 2) ()54.am-1-a m+2+am-a m+1am-1(1+a) 2(1-a) ()55. a2(a+1)-b2(b+1) (a-b)(a2+ab+b2+a+b) ()56.(x+1) 2+x(3x+2) (2x+1) 2()57.()58.5x 2m+3y4n+2 -10x 3m+7y2n+1 5x2m+3y2n+1·(y 2n

6、+1 +2xm+4) ()59. a2n+an+1-a nan(a n+a-1) ()60.()61.322622222224)8m(m -n )-27n (n -m ) (m -n)(2m+3n )(4m-6mn +9n ) (62.8a3(x 3-y 6)+(y 6 -x 3) (x-y 2)(x 2 +xy2+y4)(2a-1)(4a2+2a+1) ()63.a8-81b 8 (a 4-9b 4)(a4+9b4) ()64.a16-b 16 (a-b)(a+b)(a2+b2 )(a 4+b4)(a8+b8) (65.a4-4a 3+4a2-9 (a2-2a-3)(a 2-2a+3) (6

7、6.2222(67.)(a+m-ba -b +m-n +2(am-bn) (a+m+b +n68. ab(c2222-d)-cd(a-b) (ac+bd)(bc-ad) (69. 1+12x 2y2+48x4y4+64x 6y6 (1+4x 2y2) 3 (70.54322345222x +x y+2x y +2x y +xy +y (x+y)(x+y )(71.-a m+1y2n-1 +am-1y2n+1 am-1y2n-1 (-a 2+y2) ()72. 2(a2-3mn)+a(4m-3n) (a+2m)(2a-3n) ()-n) ()73.3-(a 3+b3+c3) 3(a+b)(b+c

8、)(a+c) ()74.(a+b+c)75. a 3m-a 3m+3 a3m(1-a)(1+a+a2) ()76.343m6122-5n4)(49m4248)-125n(7m+35mn +25n ) (77.1+x+x(x+1)+x(x+1)2+x(x+1) 3 (1+x) 4 ()78. a m+4-8a m+3-16a m+2am+2(a 2-8a-16) ()79.x3-x 2-x-y 3+y2+y (x-y)(x2+xy+y 2-x-y-1) ()80.(x+y)3 (x+y-1)(x22)+2xy(1-x-y)-1+y +x+y+1) (81.-12a 2m+1bm+2+20am+1

9、b2m+4-4a m+1bm+2(3a m-5b m+2) ()82.m+3m3m22)a-a b a (a-b)(a +ab+b ) (83.(a-b)n+3-(a-b)n (a-b)n(a-b-1)(a2+b2-2ab+a-b+1) ()二、单选题。84.的结果是A.a+5B.C.a 2-1D.a 2-a+185.4xy+2y-8x-y 2 的 结 果 是A.(4y+x)(y-2)B.(4x-y)(y-2)C.(4x+y)(y+2)D.(4x+y)(y-2)86.当 x _ 时 ,分式没有意义 . A.x 3B.x -3C.x ±3D.x 487.等于 A.B.C.D.88.A.

10、-B.C.D.-89.4a 2-b 2+c2-4ac等于 A.(2a-c+b)(2a+c-b) B.(2a-c+b)(2a-c-b) C.(2a+c+b)(2a-c-b) D.(2a+c-b)(2a-c-b)90.若代数式有意义 ,则 x 的取值范围是 A.x 1,x -2B.x 1,x2C.x1,x -2,x2D.x1,x -2,x2, x -191.a2-2ab+b 2-c 2等于A.(a-b+c)(a-b-c)B.(a+b+c)(a-b-c)C.(a-b+c)(a+b-c)D.(a-b+c)(a+b+c)92.已知的值是 A.-B.C.-D.93.54-2y 3 等于 A.2(3-y)(

11、9+3y+y2)B.(3-y)(9+3y+y2)C.(27-y3)D.2(27-y3)94. a 2(x-2a)2-a(2a-x)2 因式分解的结果是 A.a(x-2a)2(a-1)B.(x-2a)2(a 2-a)C.a(x-2a)2(a+1)D.(x-2a)2(a 2+a)95.使 分 式有意义的条件是A.x 2B.x -2C.x2 且x -2D.x096.已知的值为A.-1B.1C.1D.97.计算的结果是A.-1B.0C. 1D.298.322A.(x-y)(x22C.x(x+y)(x+z)D.x(x+y)(x-z)x -xyz+xy-xz 等于 -xz) B.(x+y)(x-xz)99

12、.计算:A.B.C.D.100.若分式无意义 ,则A.x1B.x -1C.x 1或 x -1D. 没有这样的有理数101.-a 2-14ab-49b 2 A.(a+7b)B.-(a+7b)(a-7b)C.-(a+7b)2D.(a+7b)2102.A.B.C.D.-103. x2+6x+9 等于 A.(x-3)2B.(x+3)2C.(x-3) 3D.(x+3)3104.下列等式中 , 正确的是 : A.B. -1C.D.105.下列等式中正确的是 A.B.C.D.106.A.x-1B.-x+1C.-x-1D.x+1107.÷ax 的结果是 A.B.C.D.108.的结果是A.-2B.2

13、C. -1D.1109.的结果是A.B.-C.D.110. 3x 2-3y 2 等于 A.(x-y)(x+y)B.3(x-y)(x+y)C.3(x-y)2D.3(x 2-y 2)111.A.B.-C.-D.-112.5a2-7a-5ab+7b等于A.(a-b)(5a-7)B.(a+b)(5a-7)C.(a+b)(5a+7)D.(a-b)(5a+7)113.a2-b 2+4b-4等 于A.(a+b-2)(a-b+2)B.(a-b-2)(a-b+2)C.(a+b+2)(a-b+2)D.(a+b-2)(a+b-2)114.的结果是A.-a-5B.-a+5C.a-5D.a+5115.下列各式中,正确的

14、是A.B.C.D. a+b116. a 2 b+a2-4b-4等于 A.(b+1)(a+2) B.(b+1)(a-2) C.(b+1)(a+2)(a-2) D.(b+1)(a2-4)117.如果分式的值为零,那么x的值为A.30B.0C.1D.2118.-7ab+21abx-28aby等 于A.-7(ab+3x+4y)B.-7ab(1-3x+4y)C.-7ab(4y-3x)D.7ab(1-3x+4y)119.若1x2,则分式的值为A.-1B. 3C.1D.2120.的结果是A.B.C.D.x3+x-y-y 3 等 于 2-xy+y 2+1)2+xy+y 2+1)C.(x 2+xy+y 2)(x

15、-y)121.A.(x+y)(xB.(x-y)(xD.(x 2 -xy+y 2+x)122.A.B.C.D.123.A.B.-C.-D.124.的结果是A.-1B. 0C.1D.2125.等于 A.B.C.D.126.下列因式分解，完全正确的是ABCD127.多项式 2a2+2ab+b2分解因式的结果是 A.2(a+b)2 B.(2a+b) 2C.(2a+b) 2D.128.分式的值为零时,x的值是A.2B.-1C.2,-1D.3,-1129.已知 x 为非零实数，那么的值是 A.1或3B.1或3C.1或 3 D.1或 3m2n-mn2-3m+3n130.等 于A.(m-n)(mn-3)B.(

16、m+n)(mn-3)C.(m+n)(mn+3)D.(m-n)(mn+3)131.25x 2-9y 2等于A.(5x+3y)(5x-y)B.(5x-3y)2C.(5x+3y)(5x-3y)D.(25x+9y)(x-y)132.=等于 A.-B.C.D.-133.计算A. -1-n 4B.-C.D.A.(1+n 2)(1-n)2B.(1+n 2)(1+n)(1-n)134.等于C.(1+n) 2(n-1)(1-n)D.(1+n 2)(n-1)(1+n)135.当-3<x<4时,化简分式的结果是A.2B.0C.-1D.-2136.分式中的 x 和 y 都扩大 2 倍 , 那么分式的值 A

17、. 扩大两倍B. 不变C. 扩大四倍D.缩小两倍137.已知的值为 A.B.C.-D.-138.在分式中,当a _时分式无意义.A.0B.2C.-2D.1139. a3+a2-2ab+b 2-b 3 等于 A.(a+b)(a 2+ab+b2+a-b)B.(a-b)(a2-ab+b 2+a-b)C.(a-b)(a2+ab+b2+a-b) D.(a-b)(a2-ab-b 2-a+b)140.在有理数范围内，4x-x 5等于A.x(2+x 2)(2-x2)B.x(2-x)2C.x(2+x2) 2D.x(2+x2)141.8x 2y2-16xy+8等于A.(xy-1)2B.(xy+1) 2C.8(xy

18、-1) 2D.8(xy+1) 2142.x2y-x 2z+y 2z-y 3等于A.(y-z)(x2-y 2)B.(y-z)(x-y)(x+y)C.(y-z) 2(x-y)D.(y-z)(x+y)2143.2x 3+16等 于A.(x+2)(x2-2x+4)B.2(x+2)(x2+2x+4)C.2(x+2)(x 2-2x+4)D.2(x+2)(x 2-2x-4)144.x2-y 2+3x+3y等于A.(x+y)(x+y-3)B.(x-y)(x+y+3)C.(x+y)(x-y-3)D.(x+y)(x-y+3)145.的结果是 A. -B.-C.D.146.x2-4y 2+x+2y等 于 A.(x+

19、2y)(x-2y+1)B.(x-2y)(x-2y+1)C.(x+2y)(x+2y+1)D.(x+2y)(x-2y-1)147.等于 A.B.C.D.148.x2+y2-z 2+2xy等于A.(x+y+z)(x+y-z)B.(x-y-z)(x+y+z)C.(x-y-z)(x+y-z)D.(x-y+z)(x+y-z)149.等于A.B.-C.-D.-150.(a+2b) 2-(x-3y)2等于 A.(a-2b-x+3y)(a-2b-x-3y)B.(a+2b-x-3y)(a+2b-x-3y)C.(a+2b+x-3y)(a+2b-x+3y)D.(a-2b+x-3y)(a-2b-x+3y)151. a3

20、-b3的结果是 : A.a 3-b 3 (a-b)(a2+2ab+b2) B.a3-b 3 (a-b)(a2-2ab+b 2) C.a3-b3 (a-b)(a2-ab+b 2) D.a3-b 3 (a-b)(a2+ab+b2)152.63等于 8x +xA.x 3(2x+1)(4x2-2x+1)B.x3(2x-1)(4x2-2x+1)C.x3(2x+1)(4x 2+2x+1)D.x3(2x+1)(4x2+2x-1)153.下列分式中 ,与分式的值相等的是 A.B.-C.D.-154.已知 x 3y,则的值为 A.B.C.-D.-155. a3-ab2A.(a-b)(a2222+a-b 等于 +

21、ab+1) B.(a-b)(a-ab+1) C.(a+b)(a+ab+1) D.(a+b)(a+ab-1)156.a2-20a+100等于2A.(a+10) 2B.(a-1) 2C.(a-10)D.(a-10)157.若分式的值等于零,则x的值为A.1B. ±1C.D.-1158.A.B.C.D.159.把分式中的 x 和 y 都扩大 3 倍，那么分式的值 A. 扩大了3倍 B.不变C. 缩小了 3倍D.扩大了9 倍160.分式恒等于A.B.C.D.161.x2-y 2+2x+1等于A.(x+y+1)(x-y+1)B.(x-y+1)(x-y-1)C.(x+y-1)(x-y-1)D.(

22、x+y-1)(x-y+1)162.的结果是A.B.C.D.163.的结果是A. x-4B. x-5C. x-6D. x-7164.下列各恒等变形中 ,是因式分解的是 : A.a 2-2ab+b 2 (a-b) 2B.(a+b)2 a2+2ab+b2C.a2b+ab2+cab(a+b)+cD.a2-2ab+b2-c (a-b)2-c165. 4xy+1-4x 2-y 2 等于 A.(1+2x-y)(1-2x+y) B.(1+2x+y)(1+2x-y) C.(1-2x-y)(1+2x+y) D.(4-2x+y)(2-3x-y)166.的值 A.B.C.D.167.-xy等于A.B.C.D.168.

23、计算的结果是A.B.C.D.169.16x2 +56xy+49y 2等于A.(4x-7y)2B.(4x+7y) 2C.(4x+y) 2D.(x+7y) 2170. 4-4a2+8ab-4b 2 分解因式的结果是 2A.4(1-a+b)(1+a-b)B.(2-2a+2b)(2+2a+2b)C.(2-2a+2b)(2+2a-2b)D.4 1-(a-b)171.(x-3)(3x-2)-7(x-3)的结果是A. 3(x-3)(x-3)B. (x-3)(3x-9)C.3(x-3) 2D. 3(x-3)172.A.B.C.D.173.等于A.B.C.D.174.当x_时,分式没有意义 .A.-4B.0C.

24、4D.1175.多项式 a2 -36b 2 分解因式的结果是 :A.(a 2 -6b)(a2+6b)B.(a+6b 2)(a-6b2)C.(a+6b)(a-6b)D.(a+36b)(a-36b)176.下列因式分解正确的是Ax3-xy 2BCD177.因式分解的结果是A.x(x222C.-x(x22D.x(x-y)(x+y)-y)B.x(x-y)+y )178.分解 因式a2b2-b 4等于 :A.b2(a+b)(b-a)B.b 2(a-b)2222C.b (a+b)(a-b)D.b (a+b)179. xn-y m分解因式为 (x-y)(x2+xy+y 2),那么 m、 n 的值是 A.m3

25、,n 3 B.m2,n 2 C.m 3,n 2D.m 4,n 4180.使分式的值为正的条件是A.x<B.x>C.x<0D.x>0181.多项式m(a-2)+(2-a)分解因式的结果是A.(a-2)(m+1)B.(a-2)(m-1)C.(2-a)(m+1)D.(2-a)(m-1)182.A. -a 3B. -a 4C. -a 5D. -a 6183.18x 3nym+27xny2m的公因式是A.3x nymB.9x nymC.3x n ym+1D.9x ny2m184. x2y2+x2y-4xy-2x+4等于 A.(xy-2)(y+x+2)B.(xy+2)(xy+x-2

26、)C.(xy-2)(xy+x-2)D.(xy-2)(xy-x+2)185.在有理数范围内a 8-81b 8 等于 A.(a 2 -3b 2) 2(a 2+3b2) 2B.(a4-9b 4)(a 4+9b4)C.(a4+9b4)(a 2-3b 2)(a 2+3b2)D.(a4-9b 4) 2186.C.a 2A.aB.-aD.2a187.等于A. 1B.2C.3D.4188.将多项式 16x8-1在有理数范围内分解因式,正确的结果是 : A.(4x44B.(4x4222222D.(2x2222+1)(4x-1)+1)(2x +1)(2x -1) C.(2x+1)(2x-1)+2x+1)(2x-2

27、x+1)(2x+1)(2x -1)189.多项式am-1-a m+2+am+am+1的公因式是:A.a mB.am-1C.a m+1D.a m+2190.2x 3n-12x 2ny2+18xn y4等于A.2x n(x n-3y 2) 2B.2x n(x n-3y 2 )nn22n2 2C.x (2x -6y)D.2x(x -3y)191.的结果是A.-B.-C. D.192.的结果是A.-2B.-1C.1D.2193.把 27x 2n-3x 2n+2 (n为自然数 ) 分解因式是 : A.3x2n (9-x 2)B.3x2n(3+x)(3-x)C.3xn(3+x)(3-x)D. 以上答案都不对194.a6+a4-a 2-1A.(a-1)3(a+1) 3B.(a+1)2(a-1) 2C.(a 2+1) 2(a+1)(a-1)D.(a 2+1) 2(a+1)195.将多项式 :-5x2m+1yn+2-15x m+1y2n+1 因式分解的正确结果是 : A.-5x m+1yn+2(x m+3yn-1 )B. -5x myn(x m+1y2+3xy n+1)C.-5x