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1、一、判定题;名师归纳总结 精品word资料 - - - - - - - - - - - - - - -初二数学测试题大全1.2. x2-y 23.3333334.23245. 3ax-4by+3bx-4ay a+b 3x-4y 6.x-y+xy-x+yy-x 2x-yx-y+1 227. 整式和分式统称有理式. 8. x-16y-8y-1 x+4y+1x-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. 11.22212. a+2ab+b a+b13. -4x3+8x 2-4x -4xx-1214.15.16. 甲用x小时走完s千米,乙比甲早动身a小时,早到b小时,
2、那么乙每小时走千米.22217.18. 25y-4a-12ab-9b 5y+2a+3b5y-2a+3b 19.用 A、B 表示两个整式,假如 B 中含有字母 ,式子就叫做分式 . 62242220.21.2a-32a b 2a a+4b a+2ba-2b 22.32223223.24.-xy -xy +xy -xyxy +xy-1 332225. -8a+27b -2a-3b4a+6ab+9b 第 1 页,共 14 页 - - - - - - - - -名师归纳总结 精品word资料 2- - - - - - - - - - - - - - -26.361-3a+2b 19-3a-2b19+3
3、a+2b 22227.2228. a+b -9c-1-2ab-6c a-b-3c-1a-b+3c+129.x+2x-3x-7+2+x3-xx+3 x+2x-3x+x-4 30. 10ab-3+6b-5a 5a+32b-1 3331. 87-76是 11 的倍数 2222232. m-n-2m -n +m+n 2n 4233.2-2a 21+a 1+a1-a 34.2235. m-n -m+nm-nm+n-1 322236.37. x-2xy+xy xx-y38.当 x -3 时,2239.40. x-2xy+y-1 x-y+1x-y-1 41.将 a2-b 2+2b-1 分解因式得 a+b-1
4、a-b+1 5322342. 12x-24x +18x 6x 2x-4x+3 43.44.2416242445.46. 25xy z -1 5xyz -15xyz +1 2m247.x x+1-yxy+xxx-yx+y+1 48. -am-1+14a -49am+1 -am-11-7a22249. abx+1+xa+b a+bxb+ax 42233250.a -3a +3a -a aa-1651. 1-x 1-x921+x34 1-x1+x1-x+x341+x+x 3m+33m+1m+1252. a-ab aa+ba-b 53. x-64y x-4yx2m+2y+16y +4xm-1m+2mm
5、+1m-1254. a-a+a -aa1+a1-a 222255. aa+1-bb+1 a-ba+ab+b +a+b 56.2257.x+1+x3x+2 2x+12m+3 4n+23m+72n+12m+32n+12n+1m+458. 5xy2nn+1n-10xy 5xyynn+2x 59. a+a-aa a +a-1 60.32262222222463423622261.8mm -n -27nn -m m -n 2m+3n4m -6mn +9n 362.8a x-y +y-x x-yx+xy+y 2a-14a+2a+1 88444463.a -81b a -9b a+9b 第 2 页,共 14
6、 页 - - - - - - - - -16162244名师归纳总结 精品word资料 88 - - - - - - - - - - - - - - -64.a -b a-ba+ba+b a+b a+b 65.a4-4a 3+4a2-9 a 2-2a-3a2-2a+3 68. abc22-d -cda66.67.a2-b 2+m2-n 2+2am-bn a+m+b+na+m-b-n 22-b ac+bdbc-ad 69.1+12x 2y 2+48x4y 4+64x 6y 6 1+4x 2y 2 3 570.x4+x y+2x3 22 3y +2x y4+xy5+y x+yx22 2+y m+1
7、2n-1m-12n+1m-12n-12271.-ay+ay ay-a+y 272. 2a-3mn+a4m-3n a+2m2a-3n 333373.74. a+b+c-a+b +c 3a+bb+ca+c 3m3m+33m275. a-a a 1-a1+a+a 6122442 4876. 343m -125n7m -5n 49m +35mn +25n 23477. 1+x+xx+1+xx+1+xx+11+xm+4m+3m+2m+2278. a-8a-16aaa-8a-16 32322279.x -x -x-y+y +y x-yx+xy+y -x-y-1 80. x+y3+2xy1-x-y-1 x+
8、y-1x22+y +x+y+1 2m+1m+2m+12m+4m+1m+2mm+281.-12ab+20abm+3m 3m-4ab3a -5b 2282.a-a b a a-ba+ab+b 83. a-bn+3-a-bn a-bna-b-1a2+b2-2ab+a-b+1 二、单项题;84.的结果是 A.a+5B.C.a 2-1D.a 2-a+1285.4xy+2y-8x-y的 结 果 是A.4y+xy-2B.4x-yy-2C.4x+yy+2 D.4x+yy-286. 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.-B.C.D.-22
9、289.4a -b +c -4ac 等 于 A.2a-c+b2a+c-bB.2a-c+b2a-c-bC.2a+c+b2a-c-bD.2a+c-b2a-c-b90.如代数式有意义 ,就 x 的取值范畴是A.x 1,x -2B.x 1,x2C.x 1,x -2,x2D.x 1,x -2,x2,x -122291.a -2ab+b -c等于A.a-b+ca-b-cB.a+b+ca-b-cC.a-b+ca+b-cD.a-b+ca+b+c2233392.已知的值是 A.-B.C.-D.93.54-2y等于 A.23-y9+3y+yB.3-y9+3y+yC.27-yD.227-y22222294. a 2x-2a2-a2a-