数学初二上学期计算题精选
2011.1.8
1 (X-2y)
2 (2y-x)
3 2. x n.x n-1+x n+1 x n-2+(-x)3 (-x)2n-4
3. 已知52x+1 =125求(x-2)2001+3x
4. 已知2x=3求2x+3
2011.1.9
5.(m-n)2 (n-m)3 (n-m)4 6.(y-x)3 (x-y)5+(x-y)6 (y-x)2
7, (a+b)9 (-a-b)4 +(a+b)6 (a-b)7 8. 已知x3x a x2a+1=x31 求a的值。
2011.110
9.已知2m=4 ,2n=16 求2m+n的值10. 33333333332
11. 82002?0.1252002 12。(-8)9?0.1258
2011.1.11
13. 3(X2)3 X3-(2X3)3+(5X)2 X7 14. –a a5–(a2)3–(-2a3)2
15. 2(a4)2 (a3)3-(-a)( a8)2+(-3a2)2(-a4)3(-a) 16. (-2a)6-(-3a3)2-[-(2a)2]3
2011.12
17. 已知m=c 3 c c 4 b b n 求m 18 已知44?83=2x 求x
19 2a ? 27b ? 37c =1998,
a, b, c 是自然数求(a-b-c )2002的值 20。(.9n )2=316求n 值
2011.1.13
21 如果2 8n 16n =222 求n 值 22 .[(x+y)2]3{(x+y)3}4-2[(x+y)3]6
23. 比较3555 4444 5 333 三个数大小 24。 若 a=255,b=344c=433 比较 a,b,c.的大小
2011.1.14 25. 比较 1111
2222
与2222
1111
大小 26。 -6a 2
b(x-y)3
31
ab 2(y-x)2
27 (-7x m y m )2(-xy)3-[4x 2m (-x)3y 2m y 3 28. (-2a n+1b n )2(-3a n b)2(-a 2c)
2011.1.15
29 [(x+2y)3]5[-(x+2y)2]5 30 .3(a+b)2[2(-a-b)3]+[2(a+b)]3(-a-b)2 1
322103a b c
2011.1.16 33.. ( 1
32a 2b-33
1a 3b 2
+1) (0.2ab) 34. 12x n y 2[3y n-1-2xy n+1+(-1)888]
.
35. (3a 2b-2ab 2-4b 3)(-4a 2b) 36 . 3x n (x n+1-x n +x n-1-1)
2011.1.17
37. . 4(x-y+z)-2(x+y-z)-3(-x-y-z) 38. (-5xy)2(-xy)3+(4x 2y-3x)(-x 3y 4)+x 5y 5
39. 5x-2(x+2)-3[x-2(3-5x)+7] 40.. 2x 2(x 2+3xy-y 2)-xy(6x 2-4y 2)+y 2(2x 2-4xy+y 2)
2011.1.18 41 .若 x 2+x-1=3
65,a+b+c=57
1
, a(x 2+x+1)+b(x 2+x+1)+c((x 2+x+1)的值
42. (a-b+c )(-a+b+c) 43. (-7+a+b)(-7-a-b) 44. (-3x+4)(-3x-4)
2011.1.19
45. 4(x-2)(x+5)-(2x-3)(2x+1)=5 46. (3x-2)(2x-3)≤(6x+5)(x+1)
47. 2x(x+1)+(-2x)2+1≥x(3x+4)+3x 2 48 10-4(x 2+x-3)≤2(-2x 2+x-1)
51 2001 1999-20002 52。 982
2011.1.21
53 3(4+1)(42+1)+1 (利用乘方公式) 54 4x(x-1)2+x(2x+5)(5-2x)
55 ( 4y+3x-5z) (3x-4y+5z) 56 (x-1)(x 4+1) (x 2+1)(x+1)
2011.1.22
57. 2(3a+1)(1-3a)+(a-2)(2+a) 58. (2-y)(y+2x)-(2y+x)(2y-x)
59 4x(x 2-2x-1)+x(2x+5)(5-2x) 60. 5x 2-(2x+3)(x-3)+2(x=1)(x-1)-(3x-1)(1+3x)
2011.1.23
61. (a+1)(a 2+1)(a 4+1)…..(a 2000+1) 62 . (1-
212)(1-312 )(1-412)…(1-912)(1-10
12)
63 (a+b)2(a-b)2-(2a+b 2(2a-b)2 64. (a+b+c)2
2011.1.24
65 (a-b)(a+b)2-2ab(a 2-b 2) 66. 20002-2001?1999
67 99?101?9999 68 (3a 2+21b)(3a 221b)(9a 4-4
1b 2)
2011.1.25 69. [(
21x-y)2+(21x+y)2](2
1
x 2-2y 2) 70. (a+1)(a+3)(a+5)(a+7)
71. (a+3b)2-2(a+3b)(a-3b)+(a-3b)2 72. (y+3)2-3y 2+2(y-1)2=13
2011.1.26
73. (2x-5)2+(3x+1)2 ≥13(x+1)(x-1) 74. 已知a-a 1=3 求a 2+a
1
2的值
75.已知a 2b 2+a 2+b 2+1=4ab 求a,b 值 76. (3x-2y+3
1)2
2011.1.27
77已知.a 2+b 2+c 2-ab-bc-ca=0求证a=b=c 78. [(m-n)2(m-n)3]2 ÷(m-n)4
79.已知(a+b)2=7,(a-b)2=4求a 2+b 2和ab 的值 80.( a 2a 4)3 ÷(-a 3)2
2011.1.28
81 [-2-3-8-1 ? (-1)-2 ?(-
2
1)-2
? 70 82. 已知10m =3,10n =2,求102m-n 值
83.[(a 3)3(-a 4)3]÷ (a 2 )3 ÷(a 3)2 84. (a+2b)m+1 ÷(a+2b)m-3 ÷(a+2b)2
2011.1.29
85, (a 6 ÷a 2)2 ÷[(a 9 ÷a 3) a 2] 86. 若 y 2m-1÷y=y 2 求m -2的值 87. 103+(30
1)-2
?[(-2)2002]0-(-3)3 ?0.3-1+I-13I 88. 已知x 2+x -2=5 求x 4+x -4的值
2011,1.30
89.x+y -1=10,x 3+y -3=100求 x 2+y -2的值 90.. 35a 7b 3c ÷7a 4bc
342(-3ab 3
22
÷
2011.1.31
93. [(-2xy)2(-z 2)3] ÷[-x(-y)2(xz 2)] 94. (2ab)2(a 2-b 2)-(2a 2b 2)÷4b 2+4a 2b 4
95. [(3ab)2 a 3-2a 2(3ab 2)3
2
1
b]÷ (-3a 2b)2 96. 若ax 3m y 12 ÷3x 3y 2n =4x 6y 6 求(2m+n-a)-n 的值
2011.2.1
97 l n-2 l+(m+n-1)2=0求m 50 ÷n -3的值 98. [3(x+b)3-6(x+b)2+9(x+b)] ÷3(x+b)
99.已知8a 3b m ÷28a n-1b 2= 7
2b 2
求m -- n 的值 100. (2m 3n 2+3m 2n 2—mn 3+4mn) ÷(-mn)
2011.2..2 101 (0.25a 3b 2-21a 4b 5-61a 5b 3)÷(-0.5a 3b 2) 102 [(-3xy)2x 3-2x 2 (3xy 2)2 2
1
y] ÷9x 4y 2
103 [(4x-21y)2+y(x-16
x )] ÷8x 2 104. (-3x 2+9x 3y-5x 2y 2)÷(-3x)
2011.2.3
107. [(x+3y)(x-3y)-(3x-y)2+(4x-3y)(5x+2y)-xy] 108. (12x 4y 6-8x 2y 4-16x 3y 5) ÷4x 2y 3
2011.2.4
109 4(x 2+y )(x 2-y)-(2x 2-y)2 110.[(x+
21y)2+(x-21y)2](2x 2-2
1y 2)
111. (x-i)2-(x-1)(x+1)+3(x+1)≥0 112. x(x+1)2-x(x 2-3)-2(x+1)(x-1)=20
2011. 2 5
113 [2x 2-(x+y)(x-y)][(-x-y)(-x+y)+2y 2] 114. (3x-2y+1)(3x-2y-1)
115 (x-y)2(x+y)2 116. (21a 4x 2+31a 3x 3-43ax) ÷(-3
2
a 2x 2)
2011.2..6 117 (-0.4a n b n )2(-25a n+1b 2)2 ÷(–4
1
a n b)2 118。 已知2n =4,2m =3,则 23m-2n = 119( 21)0+(-21)0+(-2
1
)-2-2-2 120。59.8? 60.2+1992
2011.2.7 121 已知x+x 1=2, 则,x 2+x 1= 122。 (-1999)2002(1999
1)2003 123.
94x 2-161y 4=(-32x+4
1y 2
)( ) 124..(x n-1)2(x 2)n
2011.2.8
125 已知a+b=7, ab=-2 则的值 126. 若,4x 2+pxy 3+
16
1y 6
则p=
127. (x 2-2x-3)(x-1)(x+3) 128. (x+2y-3z+4t)(x-2y-3z-4t)
2011.2.9 129 (-3
157)100 (5215)99 (-1)101 130. (32n 3-7mn 2+32n 5)÷3
2n 2
131 (12x 4y 6-8x 2y 4-16x 3y 5)÷4x 2y 3 132. [(2a-b)2-b(b-4a)+6a] ÷4a
2011.2.10 133 (43a 4b 7-21a 3b 8+91a 2b 6) (-3
1ab 2)2
134. (15ax n+2-9a 2x 2n +6a 3x 3n )÷(-3ax n )
135. (0.25x 3y 2-21x 4y 5-6
1x 5y 3
)÷(-0.5x 3y 2) 136. (12x 4y 6-8x 2y 4-16x 3y 5) ÷4x 2y 3
2011.2.11
137 (-23a 5x 3-5
6a 3x 5-0.3a 2x 4)÷0.6ax 3 138. [(-5xy)2x 3-2x 2(5xy) 3
21y]÷(-5x 2y)2
139[(-
31a n b n_1)+(23a n+1b n+1)2]÷(3
4
a n
b n-1)2 140. [(x+y)3-2(x+y)2-4(x+y)÷(-x-y)
2011.2.12
141 (m+1)2-5(m+1)(m-i) +3(m-1)2 142。(x 2+3x )(x-3)-x(x-2)2+(-x-y)(y-x)
143 [2x 2-(x+y)(x-y)(-x-y)(-x+y)+2y 2] 144. 23 ?1012-992 ?23
2011.2.13
145. (12+32+……+992)- (22+42+……+1002) 146. [5xy 2(x 2-3xy)+(3x 2y 2)3]÷(5xy)2
2011.2.14 149 (n+1)0-(-
32)5 ÷(32)-4 150. 2091?199
8
151 若9(a-b)2+12(a 2-b 2)+4(a+b)2=256则,5a-b 的值
152.若a+b+c=0, 则,a 2-b 2+c 2+2ac=
2011.2.1.15
153 若0.001x =1,(-3)y =,-
27
1
,则,x-y=
154 若x 2+mx+n 是一个完平方式,m,n 的关系
155 x-(k+2)+49 是完全平方式,则k= 156. (3x+2)(3x-2)(9x 2-4)
2011.2.16
157 (2x+3y-6z)2-(3x-3y+6z)2 158. 2[(3x-1)2+(3x+1)2](9x 2-1)
2011.2.17
161. (a+b)(a-b)+(a+b)2-2(2a-b)2 162. (-3x)2-(2x+1(3x-2)-3(x+2)(x-2)=0 163 [(a-
21)2-(a+2
1
)2](a+3) 164. (x+z)(x 2-2xz+z 2)(x-2)(x 2+2xz+z 2)
2011.2.18
165 5(42+1)(44+1)(48+1)(416+1) 165. 302-292+282-272+。。。+22-12 167 [-3 2
1
(y-x )]3(-x-y)[-2(x-y)-1(x+y)]2 168 .(25x 3+15x 2-20x)÷(-5x)
2011.2.19 169 (0.25a 2b-
21a 3b 2-61a 4b 3)÷(-0.5a 2b) 170. (52y 3-7y 2+32y)÷3
2y
171 24n+1-(42n +16n ) 172.. 1234567892-123456788 ?123456790
2011.2.120
173 . 若整数x,y,z 满足(89)x ?(910)y ?(15
16)z 则x,,y, z,是多少
174. (-p)8(-p2)3[(-p)3]2= (3x+1)(x-1)-(x+3)(5x-6)=x2-10x+m则m=
175. 求证N=5232n+12n-3n6n+2能被13整除176。若(2a p b p+q)=8a9b15则p= q=
2011.2.21
177 . -10(a+b)4(a-b)2 ÷5(a+b)3(a-b) 178. (2x-3y+4)(-2x-3y-4)
179. (2x-y)13{(2x-y)3}2[(y-2x)2]3180. (3?10n)4
2011.2.22
181. x2+(y-x)(y+x) 182. 103?97(利用公式计算)
183 (n+2b)2-4b2184. (x+1)(x-1)(x2+1)
2011.2.23
185 (a+b)(a-b)-(a+2b)2-(a-2b)2186. (2a2)3÷3a34a-1
187 (a2-4ab+4b2)÷(a-2b)-(4a2-9b2)÷(2a+3b) 188. 1022(利用公式)
2011.2.24
189 已知4x 2-3y 2=7,3x 2+2y 2=19求代数式14x 2-2y 2的值 190. a(a-b)-(-2a)2+ab
191 已知(a-2b )2=(a+2b)2+m ,则,m=
192. 54(y-x )3[-6313(x-y)8] 26
7(y-x)
2011.2.25
193 .(2a+b)2-(2a-b)(a+b)-2(a-2b)(a+2b) 194.已知a 2+b 2-2a+6b+10=0求a 2001 - b
1
2的值
195 x 2-(x 3y-2x 2y 2) xy 196. 3(a+5)2-2(3-a)2+(9-a)(9+a)=0
2011.2.26
197 .a 2-(b 2-3ab)-[(a 2+b 2)=3ab] 198. (2x-3y)2-(y+3x)(3x-y)
199. (-y)(y+2x)-(2y+x)(2y-x) 200.若 a 2b 2+a 2+b 2+1=4ab ,求a,b 的值
2011.2.27 201 (53a 5b 3+59a 7b 4-29a 5b 5)÷(4
3
a 5
b 3) 202. (a+b)(a-b)+(a+b)2-2(a-b)2
203.(2x 6-x 4)÷ (-41x 3)+4(21x+4
1
)(4x 2-2x+1)