初二数学测试题大全.doc

初二数学测试题大全一、判断题。1. ()2.x2-y2 () 3. ()4. ()5. 3a3x-4b3y+3b3x-4a3y(a3+b3)(3x-4y) () 6. (x-y)4+x(y-x)2+y(y-x)32(x-y)2(x-y+1) () 7. 整式和分式统称有理式. () 8. x2-16y2-8y-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. () 12. a2+2ab+b2(a+b)2 () 13. -4x3+8x2-4x-4x(x-1)2 () 14. ()15. ()16.甲用x小时走完s千米,乙比甲早出发a小时,早到b小时,那么乙每小时走千米. () 17. ()18. 25y2-4a2-12ab-9b2(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. 2a6-32a2b42a2(a2+4b2)(a+2b)(a-2b) () 22. ()23. () 24. -x3y3-x2y2+xy-xy(x2y2+xy-1) () 25. -8a3+27b3 -(2a-3b)(4a2+6ab+9b2) ()26. 361-(3a+2b)2(19-3a-2b)(19+3a+2b) ( )27. ()28. a2+b2-9c2-1-2ab-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. 873-763是11的倍数 ( ) 32. (m-n)2-2(m2-n2)+(m+n)22n2 ()33. 2-2a42(1+a2)(1+a)(1-a) ()34. ()35. m2-n2-m+n(m-n)(m+n-1) () 36. () 37. x3-2x2y+xy2x(x-y)2 () 38. 当x-3时, ()39. ()40. x2-2xy+y2-1(x-y+1)(x-y-1) () 41. 将a2-b2+2b-1分解因式得(a+b-1)(a-b+1) () 42. 12x5-24x3+18x26x2(2x3-4x+3) () 43. ()44. ()45. ()46. 25x2y4z16-1(5xy2z4-1)(5xy2z4+1) () 47.x2(x+1)-y(xy+x)x(x-y)(x+y+1) ()48. -am-1+14am-49am+1-am-1(1-7a)2 () 49. ab(x2+1)+x(a2+b2)(a+bx)(b+ax) () 50.a4-3a3+3a2-aa(a-1)3 ()51. 1-x6(1-x3)(1+x3)(1-x)(1+x)(1-x+x2)(1+x+x2) ()52. a9-ab2a(a4+b)(a4-b) () 53.x3m+3-64y3(xm+1-4y)(x2m+2+4xm+1y+16y2) ( )54.am-1-am+2+am-am+1am-1(1+a)2(1-a) ()55. a2(a+1)-b2(b+1)(a-b)(a2+ab+b2+a+b) () 56. ()57.(x+1)2+x(3x+2)(2x+1)2()58. 5x2m+3y4n+2-10x3m+7y2n+15x2m+3y2n+1(y2n+1+2xm+4) () 59. a2n+an+1-anan(an+a-1) () 60. ()61.8m3(m2-n2)-27n6(n2-m2)(m2-n2)(2m+3n2)(4m2-6mn2+9n4) () 62.8a3(x3-y6)+(y6-x3)(x-y2)(x2+xy2+y4)(2a-1)(4a2+2a+1) () 63.a8-81b8(a4-9b4)(a4+9b4) ()64.a16-b16(a-b)(a+b)(a2+b2)(a4+b4)(a8+b8) ()65.a4-4a3+4a2-9(a2-2a-3)(a2-2a+3) ()66. ()67.a2-b2+m2-n2+2(am-bn)(a+m+b+n)(a+m-b-n) () 68. ab(c2-d2)-cd(a2-b2)(ac+bd)(bc-ad) () 69.1+12x2y2+48x4y4+64x6y6(1+4x2y2)3 ()70.x5+x4y+2x3y2+2x2y3+xy4+y5(x+y)(x2+y2)2 () 71.-am+1y2n-1+am-1y2n+1am-1y2n-1(-a2+y2) ()72. 2(a2-3mn)+a(4m-3n)(a+2m)(2a-3n) () 73. ()74. (a+b+c)3-(a3+b3+c3)3(a+b)(b+c)(a+c) () 75. a3m-a3m+3a3m(1-a)(1+a+a2) () 76. 343m6-125n12(7m2-5n4)(49m4+35m2n4+25n8) ()77. 1+x+x(x+1)+x(x+1)2+x(x+1)3(1+x)4 () 78. am+4-8am+3-16am+2am+2(a2-8a-16) () 79.x3-x2-x-y3+y2+y(x-y)(x2+xy+y2-x-y-1) () 80. (x+y)3+2xy(1-x-y)-1(x+y-1)(x2+y2+x+y+1) () 81.-12a2m+1bm+2+20am+1b2m+4-4am+1bm+2(3am-5bm+2) () 82.am+3-amb3am(a-b)(a2+ab+b2) () 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.a2-1D.a2-a+1 85.4xy+2y-8x-y2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.x3B.x-3C.x3D.x4 87. 等于 A.B.C.D. 88. A.-B.C.D.- 89.4a2-b2+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.x1,x-2 B.x1,x2 C.x1,x-2,x2 D.x1,x-2,x2,x-1 91.a2-2ab+b2-c2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. 93.54-2y3等于 A.2(3-y)(9+3y+y2) B.(3-y)(9+3y+y2) C.(27-y3) D.2(27-y3) 94. a2(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(a2-a) C.a(x-2a)2(a+1) D.(x-2a)2(a2+a)95. 使分式有意义的条件是 A.x2B.x-2C.x2且x-2D.x0 96. 已知的值为 A.-1B.1C.1D. 97. 计算的结果是 A.-1B.0C.1D.2 98.x3-xyz+x2y-x2z等于 A.(x-y)(x2-xz) B.(x+y)(x2-xz) C.x(x+y)(x+z) D.x(x+y)(x-z)99. 计算: A.B.C.D.100. 若分式无意义,则 A.x1B.x-1 C.x1或x-1 D.没有这样的有理数101.-a2-14ab-49b2 A.(a+7b)B.-(a+7b)(a-7b) C.-(a+7b)2 D.(a+7b)2 102. A.B.C.D.- 103. x2+6x+9等于 A.(x-3)2B.(x+3)2C.(x-3)3D.(x+3)3 104. 下列等式中,正确的是: A. B.-1 C. D.105. 下列等式中正确的是 A. B. C. D.106. A.x-1B.-x+1C.-x-1D.x+1 107. ax的结果是 A.B.C.D. 108. 的结果是 A.-2B.2C.-1D.1 109. 的结果是 A. B.- C. D.110. 3x2-3y2等于 A.(x-y)(x+y)B.3(x-y)(x+y) C.3(x-y)2D.3(x2-y2)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-b2+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+5 115. 下列各式中,正确的是A. B. C. D.a+b 116. a2b+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.2 118. -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.2 120.的结果是 A. B. C. D.121.x3+x-y-y3等于 A.(x+y)(x2-xy+y2+1) B.(x-y)(x2+xy+y2+1) C.(x2+xy+y2)(x-y) D.(x2-xy+y2+x) 122. A.B. C.D. 123. A.B.-C.-D. 124. 的结果是 A.-1B.0C.1D.2 125. 等于 A.B.C.D. 126. 下列因式分解，完全正确的是 A BC D127. 多项式2a2+2ab+b2分解因式的结果是 A.2(a+b)2 B.(2a+b)2 C.(2a+b)2 D. 128. 分式的值为零时,x的值是 A.2B.-1C.2,-1D.3,-1 129. 已知x为非零实数，那么的值是 A.1或3 B.1或3 C.1或3 D.1或3130.m2n-mn2-3m+3n等于 A.(m-n)(mn-3) B.(m+n)(mn-3) C.(m+n)(mn+3) D.(m-n)(mn+3) 131. 25x2-9y2等于 A.(5x+3y)(5x-y)B.(5x-3y)2 C.(5x+3y)(5x-3y)D.(25x+9y)(x-y) 132. =等于 A.-B.C.D.- 133. 计算 A.-B.-C.D. 134.1-n4等于 A.(1+n2)(1-n)2 B.(1+n2)(1+n)(1-n) C.(1+n)2(n-1)(1-n) D.(1+n2)(n-1)(1+n) 135. 当-3x4时,化简分式的结果是 A.2B.0C.-1D.-2 136. 分式中的x和y都扩大2倍,那么分式的值 A.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.1 139. a3+a2-2ab+b2-b3等于 A.(a+b)(a2+ab+b2+a-b) B.(a-b)(a2-ab+b2+a-b) C.(a-b)(a2+ab+b2+a-b) D.(a-b)(a2-ab-b2-a+b)140. 在有理数范围内，4x-x5等于 A.x(2+x2)(2-x2) B.x(2-x)2 C.x(2+x2)2 D.x(2+x2) 141.8x2y2-16xy+8等于 A.(xy-1)2B.(xy+1)2C.8(xy-1)2D.8(xy+1)2 142.x2y-x2z+y2z-y3等于 A.(y-z)(x2-y2) B.(y-z)(x-y)(x+y) C.(y-z)2(x-y) D.(y-z)(x+y)2143.2x3+16等于 A.(x+2)(x2-2x+4) B.2(x+2)(x2+2x+4) C.2(x+2)(x2-2x+4) D.2(x+2)(x2-2x-4)144.x2-y2+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.x2-4y2+x+2y等于 A.(x+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-z2+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-b3的结果是: A.a3-b3(a-b)(a2+2ab+b2) B.a3-b3(a-b)(a2-2ab+b2) C.a3-b3(a-b)(a2-ab+b2) D.a3-b3(a-b)(a2+ab+b2)152.8x6+x3等于 A.x3(2x+1)(4x2-2x+1) B.x3(2x-1)(4x2-2x+1) C.x3(2x+1)(4x2+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x3y,则的值为 A.B.C.-D.- 155. a3-ab2+a-b等于 A.(a-b)(a2+ab+1) B.(a-b)(a2-ab+1) C.(a+b)(a2+ab+1) D.(a+b)(a2+ab-1)156.a2-20a+100等于 A.(a+10)2 B.(a-1)2 C.(a-10)D.(a-10)2 157. 若分式的值等于零,则x的值为 A.1B.1C.D.-1 158. 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-y2+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.(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.a2-2ab+b2(a-b)2 B.(a+b)2a2+2ab+b2 C.a2b+ab2+cab(a+b)+c D.a2-2ab+b2-c(a-b)2-c 165. 4xy+1-4x2-y2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. 计算的结果是 A. B.C.D.169. 16x2+56xy+49y2等于 A.(4x-7y)2B.(4x+7y)2C.(4x+y)2D.(x+7y)2 170. 4-4a2+8ab-4b2分解因式的结果是 A.4(1-a+b)(1+a-b) B.(2-2a+2b)(2+2a+2b) C.(2-2a+2b)(2+2a-2b) D.41-(a-b)2 171. (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)2 D.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.-4 B.0 C.4 D.1 175. 多项式a2-36b2分解因式的结果是:A.(a2-6b)(a2+6b) B.(a+6b2)(a-6b2) C.(a+6b)(a-6b)D.(a+36b)(a-36b) 176. 下列因式分解正确的是 ABCD177. x3-xy2因式分解的结果是 A.x(x2-y2)B.x(x-y)2C.-x(x2+y2)D.x(x-y)(x+y)178. 分解因式a2b2-b4等于: A.b2(a+b)(b-a)B.b2(a-b)2 C.b2(a+b)(a-b)D.b2(a+b)2179. xn-ym分解因式为(x-y)(x2+xy+y2),那么m、n的值是 A.m3,n3 B.m2,n2 C.m3,n2 D.m4,n4180. 使分式的值为正的条件是 A.xC.x0 181.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.-a3B.-a4C.-a5D.-a6 183. 18x3nym+27xny2m的公因式是 A.3xnymB.9xnym C.3xnym+1D.9xny2m 184. x2y2+x2y-4xy-2x+4等于 A.(xy-2)(y+x+2)B.(xy+2)(xy+x-2) C.(xy-2)(xy+x-2) D.(xy-2)(xy-x+2) 185. 在有理数范围内 a8-81b8等于 A.(a2-3b2)2(a2+3b2)2 B.(a4-9b4)(a4+9b4) C.(a4+9b4)(a2-3b2)(a2+3b2) D.(a4-9b4)2 186. A.aB.-aC.a2D.2a 187. 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.(4x4+1)(4x4-1) B.(4x4+1)(2x2+1)(2x2-1) C.(2x2+1)2(2x2-1)2 D.(2x2+2x+1)(2x2-2x+1)(2x2+1)(2x2-1)189. 多项式am-1-am+2+am+am+1的公因式是: A.amB.am-1C.am+1D.am+2 190.2x3n-12x2ny2+18xny4等于 A.2xn(xn-3y2)2B.2xn(xn-3y2) C.xn(2xn-6y2)2D.2x(xn-3y2)2 191. 的结果是 A.- B.- C. D.192. 的结果是 A.-2 B.-1 C.1 D.2193. 把27x2n-3x2n+2(n为自然数)分解因式是: A.3x2n(9-x2) B.3x2n(3+x)(3-x) C.3xn(3+x)(3-x) D.以上答案都不对 194.a6+a4-a2-1 A.(a-1)3(a+1)3B.(a+1)2(a-1)2 C.(a2+1)2(a+1)(a-1) D.(a2+1)2(a+1)195. 将多项式:-5x2m+1yn+2-15xm+1y2n+1因式分解的正确结果是: A.-5xm+1yn+2(xm+3yn-1) B.-5xmyn(xm+1y2+3xyn+1) C.-5x2m+1y2n+1(y-n+1+3x-m) D.-5xy(x2myn+1+3xmy2n)196. ambn-anbm（其中mn）分解因式的结果是 A.ambn(1-bm-n) B.anbn(am-n-bm-n) C.ambm(bn-an)D.ab(am-1-bm-1) 197. 如果ab=2c，且ab，则= A4 B2 C0 D2198. 的结果是 A.B.C.D.199.a5-a3+a2-1等于 A.(a2-1)(a3+1)B.(a+1)2(a-1)(a2-a+1)C.(a+1)(a-1)(a3+1)D.(a-1)2(a+1)(a2-a+1)200. 多项式-3x2n-9xn分解因式,其结果是: A.3(-x2n+3xn) B.-(x2n-3xn) C.-3xn(xn+3)D.-3xn(x2+3)三、填空题。201. 已知:a+2b100,a-2b0.01,则5a2-20b2的值是_. 202.的值等于零时,x的取值为_. 203. 当x_时,分式的值是零. 204. 已知a-b-c-5,则a(a-b-c)+b(c-a+b)+c(b+c-a)的值是_. 205._ 206. _207. 当x-1,a296,b-307,c2009时,x(a+b-3c)-(3c-a-b)的值是_. 208. 已知:a-b1,则a3-b3-3ab_. 209. 已知:x+y-2,a+b,x2-xy+y2-1, 求bx3+ay3+by3+ax3的值是_. 210. 当x_时,分式没有意义. 211._ 212. 当m_时,分式的值为0.213. 已知=2000，则的值为_214. 在分式中当a_时分式的值为零.215. 当x3时，分式，则m_216. 当x_时,分式的值为零.217._ 218._219._(用分数表示)220. 填写下式变形的依据: 依据_ ,依据_ _.答案部分一、1. F2. F3. F4. T5. F6. F7. T8. F9. T10. T11. T12. T13. T14. F15. T16. T17. F18. F19. T20. T21. T22. T23. T24. T25. T26. T27. T28. T29. F30. T31. T32. F33. T34. T35. T36. T37. T38. T39. T40. T41. T42. T43. F44. F45. T46. F4