1、1150 道化简求值题13ab-4ab+8ab-7ab+ab=_. 2.7x-(5x-5y)-y=_. 3.23a3bc2-15ab2c+8abc-24a3bc2-8abc=_. 4.-7x2+6x+13x2-4x-5x2=_. 5.2y+(-2y+5)-(3y+2)=_. 26.(2x2-3xy+4y2)+(x2+2xy-3y2)=_. 7.2a-(3a-2b+2)+(3a-4b-1)=_. 8.-6x2-7x2+15x2-2x2=_. 9.2x-(x+3y)-(-x-y)-(x-y)=_. 10.2x+2y-3x-2(x-y)=_. 11.5-(1-x)-1-(x-1)=_. 312.(
2、)+(4xy+7x2-y2)=10x2-xy. 13.(4xy2-2x2y)-( )=x3-2x2y+4xy2+y3. 14.已知 A=x3-2x2+x-4,B=2x3-5x+3,计算 A+B=_. 15.已知 A=x3-2x2+x-4,B=2x3-5x+3,计算 A-B=_. 16.若 a=-0.2,b=0.5,代数式-(|a2b|-|ab2|)的值为_. 17.一个多项式减去 3m4-m3-2m+5 得-2m4-3m3-2m2-1,那么这个多项式等于_. 418.-(2x2-y2)-2y2-(x2+2xy)=_. 19.若-3a3b2 与 5ax-1by+2 是同类项,则 x=_,y=_.
3、 20.(-y+6+3y4-y3)-(2y2-3y3+y4-7)=_. 21.化简代数式 4x2-7x2-5x-3(1-2x+x2)的结果是_. 22.2a-b2+c-d3=2a+( )-d3=2a-d3-( )=c-( ). 31.3a-(2a-3b)+3(a-2b)-b=_. 523.化简代数式 x-y-2x-(x+y)等于_. 24.5a2+( )a-7+( )a2-4a+( )=a2+2a+1. 25.3x-y-(2x+y)=_. 26.化简|1-x+y|-|x-y|(其中 x0)等于_. 27.已知 xy,x+y-|x-y|=_. 28.已知 x0,y0,化简|x+y|-|5-x-y
4、|=_. 629.4a2n-an-(3an-2a2n)=_. 30.若一个多项式加上-3x2y+2x2-3xy-4 得 2x2y+3xy2-x2+2xy, 则这个多项式为_. 31.-5xm-xm-(-7xm)+(-3xm)=_. 32.当 a=-1,b=-2 时, a-(b-c)-b-(-c-a)=_. 33.当 a=-1,b=1,c=-1 时, -b-2(-5a)-(-3b+5c)=_. 734.-2(3x+z)-(-6x)+(-5y+3z)=_. 35.-5an-an+1-(-7an+1)+(-3an)=_. 36.3a-(2a-4b-6c)+3(-2c+2b)=_. 38.9a2+7a
5、2-2a-(-a2+3a)=_. 39. 当 2y-x=5 时,5(x-2y)2-3(-x+2y)-100=_. 40. 2(2a2+2ab)-(3a2+4ab-b2），其中 a=2，b=-1841 .1/4（a+b）2-6(a-b)+3/4(a+b)2+6(a-b)42 .5（a-b）2-3(a-b)2-7(a-b)-(a-b)2+7(a-b)43. 1/2a2-1/4b+3/2a2-3/4b-a244. -5yx2+4xy2-2xy+6x2y+2xy+545.16m+25-40m+34m46.(4+2x)+(2x-x)947.4a+8a-(-6a)+3a-2b48.8a+4(a+2)49.
6、(2n-3)+(2n+3)-(2n-3)50.7x-(5x-5y)-y51.3a-4b+4a-3b52.7a+3b-(4a+5b)-31053.3ab-4ab+8ab-7ab+ab54.(x-y)-2(x-y) 55.16m+25-40m+34m56.(4+2x)+(2x-x)57.4a+8a-(-6a)+3a-2b58.8a+4(a+2)1159.(2n-3)+(2n+3)-(2n-3)60.7x-(5x-5y)-y61.3a-4b+4a-3b62.7a+3b-(4a+5b)-363.3ab-4ab+8ab-7ab+ab64.(x-y)-2(x-y) 1264.x-y-2x-(x+y)65.
7、3ab-4ab+8ab-7ab+ab66.7x-(5x-5y)-y67.23a3bc2-15ab2c+8abc-24a3bc2-8abc 68.-7x2+6x+13x2-4x-5x269.2y+(-2y+5)-(3y+2) 1370.(2x2-3xy+4y2)+(x2+2xy-3y2) 71.2a-(3a-2b+2)+(3a-4b-1)72.-6x2-7x2+15x2-2x2 73.2x-(x+3y)-(-x-y)-(x-y)74.2x+2y-3x-2(x-y) 75.5-(1-x)-1-(x-1)1476.10x2-xy 78.x3-2x2y+4xy2+y3 79.4x2-7x2-5x-3(
8、1-2x+x2)80.2(2a+2ab)-(3a+4ab-b），其中 a=2，b=-181.1/4（a+b）-6(a-b)+3/4(a+b)+6(a-b)82.5（a-b）-3(a-b)-7(a-b)-(a-b)+7(a-b)1583.1/2a-1/4b+3/2a-3/4b-a84.-5yx+4xy-2xy+6xy+2xy+585.16m+25-40m+34m86.(4+2x)+(2x-x)87.4a+8a-(-6a)+3a-2b88.8a+4(a+2)1689.(2n-3)+(2n+3)-(2n-3)90.7x-(5x-5y)-y91.3a-4b+4a-3b92.7a+3b-(4a+5b)-
9、393.3ab-4ab+8ab-7ab+ab94.(x-y)-2(x-y) 1795.16m+25-40m+34m96.(4+2x)+(2x-x)97.4a+8a-(-6a)+3a-2b98.8a+4(a+2)99.(2n-3)+(2n+3)-(2n-3)100.7x-(5x-5y)-y18101.3a-4b+4a-3b102.7a+3b-(4a+5b)-3103.3ab-4ab+8ab-7ab+ab104.(x-y)-2(x-y) 105.x-y-2x-(x+y)106.3ab-4ab+8ab-7ab+ab19107.7x-(5x-5y)-y108.23a3bc2-15ab2c+8abc-2
10、4a3bc2-8abc 109.-7x2+6x+13x2-4x-5x2110.2y+(-2y+5)-(3y+2) 111.(2x2-3xy+4y2)+(x2+2xy-3y2) 112.2a-(3a-2b+2)+(3a-4b-1)20113.-6x2-7x2+15x2-2x2 114.2x-(x+3y)-(-x-y)-(x-y)115.2x+2y-3x-2(x-y) 116.5-(1-x)-1-(x-1)117.10x2-xy 118.x3-2x2y+4xy2+y3 21119.4x2-7x2-5x-3(1-2x+x2)120.（3X+2Y)+(4X+3Y)其中 X=5,Y+3121.(5a2-
11、3b2)+(a2+b2)-(5a2+3b2),其中 a=-1,b=1 122. -2(x- )+3( x+ ),其中 x=-4；123. (3xy-2x2)-(2x2-y2)-(y2-2xy)+(-y2+5x2+xy),其中 x= ,y=- ；124. 5xyz-2x2y-3xyz-(4xy2-x2y)其中 x=-2,y=-1,z=3；22125. 3ab-4ab+8ab-7ab+ab=_. 126. 7x-(5x-5y)-y=_. 127. 23a3bc2-15ab2c+8abc-24a3bc2-8abc=_. 128. -7x2+6x+13x2-4x-5x2=_. 129. 2y+(-2y
12、+5)-(3y+2)=_. 130. (2x2-3xy+4y2)+(x2+2xy-3y2)=_. 23131. 2a-(3a-2b+2)+(3a-4b-1)=_. 132. -6x2-7x2+15x2-2x2=_. 133. 2x-(x+3y)-(-x-y)-(x-y)=_. 134. 2x+2y-3x-2(x-y)=_. 135. 5-(1-x)-1-(x-1)=_. 136. (4xy+7x2-y2)=10x2-xy. 24137. (4xy2-2x2y)-( )=x3-2x2y+4xy2+y3. 138.若 a=-0.2,b=0.5,代数式-(|a2b|-|ab2|)的值为_. 139.
13、 -(2x2-y2)-2y2-(x2+2xy)=_. 140. 2X6-2(X-2) 其中 X=-2141. (5a2a2 3 4a3)(a3a3 a2)，其中 a2142. (2m2n2mn2)2(m2n1)2mn22，其中 m2 ，n225143. (5a2a2 3 4a3)(a3a3 a2)，其中 a2144. (2m2n2mn2)2(m2n1)2mn22，其中 m2 ，n2145. 3(abbc)3(abac)4ac 3bc 其中：a2001/2002，b 1/3 ， c1146. （3xy10y） 5x(2xy2y3x)其中 xy2 ，xy326147. 已知 a2 ，b1，c3，求代数式5abc2a2b3abc（4ab2 a2b）的值。148. 2 ( a2b + ab2)- 2ab2 - (1- a2b) - 2，其中 a= -2，b=0 5149. （3x24y ）（ 2x2-5y+6）+(x2-5y-1) 其中 x=-3 ,y=-1150. 3ab-4ab+8ab-7ab+ab 其中 a=1b=2
