初二数学测试题大全

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)3＝2(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积形式叫做多项式因式分解.(

)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,

假如B中含有字母,

式子就叫做分式.(

)20.(

)21.2a6-32a2b4

＝2a2(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+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倍数(

)32.(m-n)2-2(m2-n2)+(m+n)2＝2n2(

)33.

2-2a4＝2(1+a2)(1+a)(1-a)(

)34.(

)35.m2-n2-m+n＝(m-n)(m+n-1)(

)36.(

)37.x3-2x2y+xy2＝x(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+18x2＝6x2(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-a＝a(a-1)3(

)51.1-x6＝(1-x3)(1+x3)＝(1-x)(1+x)(1-x+x2)(1+x+x2)(

)52.a9-ab2＝a(a4+b)(a4-b)(

)53.

x3m+3-64y3＝(xm+1-4y)(x2m+2+4xm+1y+16y2)(

)54.

am-1-am+2+am-am+1＝am-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+1＝5x2m+3y2n+1·(y2n+1+2xm+4)(

)59.a2n+an+1-an＝an(an+a-1)(

)60.(

)61.

8m3(m2-n2)-27n6(n2-m2)＝(m2-n2)(2m+3n2)(4m2-6mn2+9n62.

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+1＝am-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+3＝a3m(1-a)(1+a+a2)(

)76.343m6-125n12＝(7m2-5n4)(49m4+35m2n4+25n77.1+x+x(x+1)+x(x+1)2+x(x+1)3＝(1+x)4(

)78.am+4-8am+3-16am+2＝am+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+282.

am+3-amb3＝am(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、单项选择题。84.结果是[

]A.a+5

B.

C.a2-1

D.a2-a+185.

4xy+2y-8x-y2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＝3

B.x＝-3

C.x＝±3

D.x＝487.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取值范围是[

]A.x≠1,

x≠-

2

B.x≠1,

x≠2C.x≠1,

x≠-2,

x≠2

D.x≠1,

x≠-2,

x≠2,

x≠-191.

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

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.使分式有意义条件是[

]A.x≠2

B.x≠-2

C.x≠2且x≠-2

D.x≠096.已知

值为

[

]A.-1

B.1

C.1

D.97.计算结果是[

]A.

-1

B.

0

C.

1

D.

298.

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.

x＝1

B.

x＝-1C.

x＝1或x＝-1

D.没有这么有理数101.

-a2-14ab-49b2＝[

]A.(a+7b)

B.-(a+7b)(a-7b)C.-(a+7b)2

D.(a+7b)2102.＝[

]A.

B.

C.

D.-103.x2+6x+9等于[

]A.(x-3)2

B.(x+3)2

C.(x-3)3

D.(x+3)3104.以下等式中,正确是:[]A.B.＝-1C.D.105.以下等式中正确是[]A.

B.C.D.106.＝[

]A.x-1

B.-x+1

C.-x-1

D.x+1107.÷ax结果是[

]A.

B.

C.

D.108.结果是[

]A.

-2

B.

2

C.

-1

D.

1109.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)2

D.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.结果是[

]A.

-a-5

B.

-a+5

C.

a-5

D.

a+5115.以下各式中,

正确是［

］

A.

B.

C.

D.＝a+b116.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.假如分式值为零,

那么x值为[

]A.30

B.0

C.1

D.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1＜x＜2,

则分式值为[

]A.

-1

B.

3

C.

1

D.

2120.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.结果是[

]A.

-1

B.

0

C.

1

D.

2125.

等于[

]A.

B.

C.

D.126.以下因式分解，完全正确是[

]A．B．C．D．127.多项式2a2+2ab+b2分解因式结果是[

]A.2(a+b)2B.(2a+b)2C.(2a+b)2D.128.分式值为零时,

x值是[

]A.2

B.-1

C.2,

-1

D.3,

-1129.已知x为非零实数，那么值是[

]A.－1或3B.1或3C.－1或－3D.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)2C132.

=等于[

]A.-

B.

C.

D.-133.计算＝[

]A.

-

B.

-

C.

D.

134.

1-n4等于[

]A.(1+n2)(1-n)2B.(1+n2)(1+n)(1-n)C.(1+n)2(n-1)(1-n)

D.(1+n2)(n-1)(1+n)135.当-3<x<4时,

化简分式结果是[

]A.2

B.0

C.-1

D.-2136.分式中x和y都扩大2倍,

那么分式值[

]A.扩大两倍

B.不变

C.扩大四倍

D.缩小两倍137.已知值为[

]A.

B.

C.-

D.-138.在分式中,

当a＝________时分式无意义.[

]A.0

B.2

C.-2

D.1139.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)2

B.(xy+1)2

C.8(xy-1)2

D.8(xy+1)2142.

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.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.以下分式中,

与分式值相等是[]A.

B.-C.

D.-154.已知x＝3y,

则值为[

]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)2C.(a-10)

D.(a-10)2157.若分式值等于零,

则x值为[

]A.1

B.±1

C.

D.-1158.[

]A.

B.

C.

D.159.把分式中x和y都扩大3倍，那么分式值[]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.结果是[

]A.B.C.D.163.结果是[

]A.

x-4

B.

x-5

C.

x-6

D.

x-7164.以下各恒等变形中,

是因式分解是:[

]A.a2-2ab+b2＝(a-b)2B.(a+b)2＝a2+2ab+b2C.a2b+ab2+c＝ab(a+b)+cD.a2-2ab+b2165.4xy+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.值＝[

]A.

B.C.

D.167.

-xy等于[

]A.

B.C.

D.168.计算结果是[

]A.

B.

C.

D.

169.16x2+56xy+49y2等于[

]A.(4x-7y)2

B.(4x+7y)2

C.(4x+y)2

D.(x+7y)2170.4-4a2+8ab-4b2分解因式结果是[

]A.4(1-a+b)(1+a-b)

B.(2-2a+2b)(2+2a+2b)C.(2-2a+2b)(2+2a-2b)

D.4〔1-(a-b)2〕171.(x-3)(3x-2)-7(x-3)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.-4

B.0

C.4

D.1175.多项式a2-36b2分解因式结果是:[

]A.(a2-6b)(a2+6b)

B.(a+6b2)(a-6b2)C.(a+6b)(a-6b)

D.(a+36b)(a-36b)176.以下因式分解正确是[

]A．B．C．D．177.x3-xy2

因式分解结果是[

]A.x(x2-y2)

B.x(x-y)2

C.-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)2C.b2(a+b)(a-b)

D.b2(a+b)179.xn-ym分解因式为(x-y)(x2+xy+y2),那么m、n值是[

]A.m＝3,n＝3B.m＝2,n＝2C.m＝3,n＝2180.使分式值为正条件是[

]A.x<

B.x>

C.x<0

D.x>0181.多项式m(a-2)+(2-a)分解因式结果是[

]A.(a-2)(m+1)B.(a-2)(m-1)C.(2-a)(m+1)D.(2-a)(m-1)182.[

]A.

-a3

B.

-a4

C.

-a5

D.

-a6183.18x3nym+27xny2m公因式是[

]A.3xnym

B.9xnymC.3xnym+1

D.9xny2m184.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)2B.(a4-9b4)(a4+9b4)

C.(a4+9b4)(a2-3b2)(a2+3b2)D.(a4-9b4)2186.＝[

]A.a

B.-a

C.a2

D.2a187.等于[

]A.

1

B.

2

C.

3

D.

4188.将多项式16x8-1在有理数范围内分解因式,

正确结果是:[

]A.(4x4+1)(4x4-1)B.(4x4+1)(2x2+1)(2x2-1)C.(2x2+1)2(2x2-1)2D.(2x2+2x+1)(2x2-2x+1)(2x2+1)(2x2-1)189.多项式

am-1-am+2+am+am+1公因式是:[

]A.am

B.am-1

C.am+1

D.am+2190.

2x3n-12x2ny2+18xny4等于[

]A.2xn(xn-3y2)2

B.2xn(xn-3y2)C.xn(2xn-6y2)2

D.2x(xn-3y2)2191.结果是[

]A.-B.-C.

D.192.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)3

B.(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m＞n）分解因式结果是[

]A.ambn(1-bm-n)

B.anbn(am-n-bm-n)C.ambm(bn-an)

D.ab(am-1-bm-1)197.假如a＋b=2c，且a≠b，则=[

]A．－4B．－2C．0D．2198.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+2b＝100,

a-2b＝0.01,

则

5a2-20b2值是_________.202.值等于零时,

x取值为______.203.当x＝_______时,分式值是零.204.已知

a-b-c＝-5,

则

a(a-b-c)+b(c-a+b)+c(b+c-a)值是____________.205.＝___________206.＝_________207.当

x＝-1,

a＝296,

b＝-307,

c＝时,

x(a+b-3c)-(3c-a-b)值是____.208.已知:

a-b＝1,

则

a3-b3-3ab＝________.209.已知:

x+y＝-2,

a+b＝,

x2-xy+y2＝-1,

求bx3+ay3+by

3+ax3值是____________.210.当x＝______时,

分式没有意义.211.＝___________212.当m＝__________时,分式值为0.213.已知=，则值为_______．214.在分式中当a＝_______时分式值为零.215.当x＝3时，分式，则m＝________．216.当x＝_____时,分式值为零.217.＝_________218.＝_________219.＝_____

(用分数表示)220.填写下式变形依据: