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1、 整式的加减专项练习100题有答案1, 3a+5b-2b-a2, 3a-2b-a+b3, 22a2+9b+3-5a2-4b4、 x3-2y3-3x2y-3x3-3y3-7x2y5, 3x2-7x-4x-3-2x26、 2xy-y-y+yx7, 5a2b-3ab2-2a2b-7ab 8、 -2ab+3a-22a-b+2ab9, 7m2n-5mn-4m2n-5mn 10, 5a2+2a-1-43-8a+2a211、 -3x2y+3xy2+2x2y-2xy2;12、 2a-1-2a-3+313, -2ab-3a2-2b2-5ab+a2+2ab14, x2-xy+y-3x2+xy-2y15, 3x2-
2、7x-4x-3-2x216、 a2b-2a2b-2a2c-2bc+a2c;17, -2y3+3xy2-x2y-2xy2-y318, 22x-3y-3x+2y+119, -3a2-4ab+a2-22a+2ab20, 5m-7n-8p+5n-9m-p;21、 5x2y-7xy2-xy2-3x2y;22, 3-3a2-2a-a2-25a-4a2+1-3a23, 3a2-9a+5-7a2+10a-5;24, -3a2b-2ab2-a2b-2a2b+4ab225、 5a-3a2+1-4a3-3a2;26, -2ab-3a2-2b2-5ab+a2+2ab 27, (8xyx2y2)(y2x28xy); 2
3、8, (2x23x)4(xx2); 29, 3x27x(4x3)2x2 30, 5a+4b-3a-3a+b; 31, 3a2-3ab+2b2+a2+2ab-2b2; 32, 2a2b+2ab2-2a2b-1+2ab2+2 33, 2a2-1+2a-3a-1+a2; 34, 2x2-xy-32x2-3xy-2x2-2x2-xy+y235、 aba2bab(a2b)1 36, (8xyx2y2)(y2x28xy); 37, 2x(3x2y3)(5y2); 38, (3a2b)(4a3b1)(2ab3)39, 4x3(6x3)(9x3)40, 32xy2yx26xy4x2y 41, 13(2aba)
4、十12(2a3ab)42, 3x5x(3x2); 43, (3a2bab2)(ab23a2b)44, 45, (x254x3)(x35x4) 46, 5a2-2a+3-1-2a+a2+3-1+3a-a2 47, 53a2b-ab2-4-ab2+3a2b 48, 4a2+23ab-2a2-7ab-1 49, xy+-xy-2xy2-3y2x 50, 5a2-a2-5a2-2a-2a2-3a 51, 5m-7n-8p+5n-9m+8p 52, 5x2y-7xy2-xy2-3x2y 53, 3x2y-2x2y-32xy-x2y-xy54, 3x2-5x-4( x2-1)+5x255, 2a3b- a
5、3b-a2b+ a2b-ab2;56、 a2+4ab-4b2-3a2+b2-7b2-ab 57, a2+2a3+-2a3+-3a3+3a2; 58, 5ab+-4a2b2+8ab2-3ab+-a2b+4a2b2; 59, 7y-3z-8y-5z; 60, -32x2-xy+4x2+xy-6 61, x3+3x2y-5xy2+9y3+-2y3+2xy2+x2y-2x3-4x2y-x3-3xy2+7y362、 -3x2y+2x2y+3xy2-2xy2;63, 3a2-2ab-2-3ab+b2;64, 5abc-2a2b-3abc-4a2b-ab265, 5m2-m2+5m2-2m-2m2-3m66
6、、 -2m-3m-n+1-2-167, a-( a-4b-6c)+3(-2c+2b) 68, -5an-an-7an+-3an69, x2y-3xy2+2yx2-y2x 70, a22- a2b+ ab2;71, 3a-2c-6a-c-b+c+a+8b-6 72, -3xy-2x2-y2-5xy-4x2+2xy;73, 化简, 求值x2(x2y2),其中x2, y74, 化简, 求值x2(xy2)(xy2),其中x2,y75, 其中x1;76、 化简,求值4m+n-1-m-4n,m= n=-177, 化简, 求值2(a2b2b3ab3)3a3(2ba23ab23a3)4b3,其中a3,b278
7、, 化简,求值:2x3-xyz-2x3-y3+xyz+xyz-2y3,其中x=1,y=2,z=-379, 化简,求值:5x2-3x-22x-3+7x2,其中x=-2 80、 假设两个多项式的与是2x2+xy+3y2,一个加式是x2-xy,求另一个加式81, 假设2a2-4ab+b2与一个多项式的差是-3a2+2ab-5b2,试求这个多项式82, 求5x2y2x2y与2xy24x2y的与 83, 求3x2x5与4x7x2的差84, 计算 5y+3x+5z与12y+7x-3z的与 85, 计算8xy+3xy-2与-2xy+5xy-3的差86, 多项式-x+3xy-y与多项式M的差是-x2-xy+y
8、,求多项式M87、 当x=- ,y=-3时,求代数式3x2-2xy-3x2-2y+2xy+y的值88,化简再求值5abc-2ab-3abc-4ab-ab-2ab,其中a=-2,b=3,c=-89, A=a-2ab+b,B=a+2ab+b1求A+B;2求(B-A);90, 小明同学做一道题,两个多项式A,B,计算A+B,他误将A+B看作A-B,求得9x2-2x+7,假设B=x2+3x-2,你能否扶植小明同学求得正确答案?91, :M=3x2+2x-1,N=-x2-2+3x,求M-2N92, ,求3AB93、 Ax2xyy2,B3xyx2,求2A3B94, (b1)20,求5ab22a2b(4ab
9、22a2b)的值95, 化简求值:5abc-2a2b+3abc-24ab2-a2b,其中a, b, c满足|a-1|+|b-2|+c2=096、 a,b,z满足:1|x-2|+y+32=0,2z是最大的负整数,化简求值: 2x2y+xyz-3x2y-xyz-4x2y97, a+b=7,ab=10,求代数式5ab+4a+7b+6a-3ab-4ab-3b的值98、 m2+3mn=5,求5m2-+5m2-2m2-mn-7mn-5的值99, 设A=2x2-3xy+y2+2x+2y,B=4x2-6xy+2y2-3x-y,假设|x-2a|+y-3=0,且B-2A=a,求a的值100, 有两个多项式:A2a
10、24a1,B2(a22a)3,当a取随意有理数时,请比拟A与B的大小答案:1, 3a+5b-2b-a=5a+13b2, 3a-2b-a+b=4a-b3, 22a2+9b+3-5a2-4b=11a+6b4, x3-2y3-3x2y-3x3-3y3-7x2y= -2x3+y3+4x2y5, 3x2-7x-4x-3-2x2 = 5x2 -3x-36, 2xy-y-y+yx= xy7, 5a2b-3ab-2ab-7ab = -ab+11ab8, -2ab+3a-22a-b+2ab= -2a+b9, 7mn-5mn-4mn-5mn= 3mn 10, 5a2+2a-1-43-8a+2a2= -3a2+34
11、a-13 11, -3xy+3xy+2xy-2xy= -xy+xy 12, 2a-1-2a-3+3=413, -2ab-3a-2b-5ab+a+2ab= 7a+ab-2b14, x-xy+y-3x+xy-2y= -2x-4xy+7y15, 3x-7x-4x-3-2x=5x-3x-316, a2b-2a2b-2a2c-2bc+a2c= -a2b+2bc+6a2c17, -2y3+3xy2-x2y-2xy2-y3= xy2-x2y18, 22x-3y-3x+2y+1=2x-8y-119, -3a2-4ab+a2-22a+2ab=-2a-4a20, 5m-7n-8p+5n-9m-p = -4m-2n
12、-9p21, 5x2y-7xy2-xy2-3x2y=4xy2-4x2y22, 3-3a2-2a-a2-25a-4a2+1-3a=-18a2 +7a+223, 3a2-9a+5-7a2+10a-5=10a2-19a+1024, -3a2b-2ab2-a2b-2a2b+4ab2= -4a2b-64ab225、 5a-3a2+1-4a3-3a2=5a-4a2+126, -2ab-3a2-2b2-5ab+a2+2ab=7a+ab-2b 27, (8xyx2y2)(y2x28xy)=0 28, (2x23x)4(xx2) = 6x-x-29, 3x27x(4x3)2x2= 5x23x3 30, 5a+4
13、b-3a-3a+b= 5a+3b 31, 3a-3ab+2b+a+2ab-2b= 4a-ab 32, 2ab+2ab-2ab-1+2ab+2= -1 33, 2a2-1+2a-3a-1+a2= -a2-a+2 34, 2x2-xy-32x2-3xy-2x2-2x2-xy+y2=-2x2+5xy-2y235, aba2bab(a2b)1 = ab-1 36, (8xyx2y2)(y2x28xy)=0 37, 2x(3x2y3)(5y2)=-x-3y-1 38, (3a2b)(4a3b1)(2ab3)= -a-4b+439, 4x3(6x3)(9x3) x340, 32xy2yx26xy4x2y
14、= -2 x2y+4 41, 13(2aba)十12(2a3ab)=2-7a42, 3x5x(3x2)=-5x+2 43, (3a2bab2)(ab23a2b)= -2ab2 44, = 5x+y 45, (x254x3)(x35x4)= 3xx25x+146, 5a2-2a+3-1-2a+a2+3-1+3a-a2=a2+9a-147, 53a2b-ab2-4-ab2+3a2b=3a2b-ab2 48, 4a2+23ab-2a2-7ab-1=1-ab 49, xy+-xy-2xy2-3y2x=xy+xy 50, 5a2-a2-5a2-2a-2a2-3a=11a2-8a 51, 5m-7n-8p
15、+5n-9m+8p=-4m-2n 52, 5x2y-7xy2-xy2-3x2y=8x2y-6xy2 53, 3x2y-2x2y-32xy-x2y-xy=-2x2y+7xy54, 3x2-5x-4( x2-1)+5x2 = 10x-5x-455, 2a3b- a3b-a2b+ a2b-ab2 = a3b- a2b-ab2 56, a2+4ab-4b2-3a2+b2-7b2-ab=-2a2+11ab-14b257, a2+2a3+-2a3+-3a3+3a2 = -3a3+4a2 58, 5ab+-4a2b2+8ab2-3ab+-a2b+4a2b2=8ab+8ab2-a2b 59, 7y-3z-8y
16、-5z=-y+2z 60, -32x2-xy+4x2+xy-6=-2x2+7xy-2461, x3+3x2y-5xy2+9y3+-2y3+2xy2+x2y-2x3-4x2y-x3-3xy2+7y3=0 62, -3x2y+2x2y+3xy2-2xy2 = -x2y+xy263, 3a2-2ab-2-3ab+b2=3a-2b64, 5abc-2a2b-3abc-4a2b-ab2=8abc-6a2b+ab265, 5m2-m2+5m2-2m-2m2-3m=m2-4m66, -2m-3m-n+1-2-1=m-3n+467, a-( a-4b-6c)+3(-2c+2b)= -a+10b68, -5an
17、-an-7an+-3an= -2an69, x2y-3xy2+2yx2-y2x=3x2y-4xy270、 a22- a2b+ ab2 = -a2b71, 3a-2c-6a-c-b+c+a+8b-6= 10a+9b-2c-672, -3xy-2x2-y2-5xy-4x2+2xy= 2x-y73, 化简, 求值x2(x2y2),其中x2, y 原式=2x2y22 =6 74, 化简, 求值x2(xy2)(xy2),其中x2,y 原式=-3x+y=675, 其中x1; 原式=x+x-x+6=676, 化简,求值4m+n-1-m-4n,m= n=-1 原式=5m-3n-1=577, 化简, 求值2(a
18、2b2b3ab3)3a3(2ba23ab23a3)4b3,其中a3,b2 原式=-2ab3+3ab21278, 化简,求值:2x3-xyz-2x3-y3+xyz+xyz-2y3,其中x=1,y=2,z=-3 原式=-2xyz=679, 化简,求值:5x2-3x-22x-3+7x2,其中x=-2 原式=-2x+x-6=-1680, 假设两个多项式的与是2x2+xy+3y2,一个加式是x2-xy,求另一个加式 2x2+xy+3y2 x2-xy= x2+2xy+3y281, 假设2a2-4ab+b2与一个多项式的差是-3a2+2ab-5b2,试求这个多项式 2a2-4ab+b2 -3a2+2ab-5
19、b2=5a2 6ab+6b282, 求5x2y2x2y与2xy24x2y的与 5x2y2x2y+2xy24x2y=3xy22x2y83, 求3x2x5与4x7x2的差 3x2x54x7x2=4x22x9 84, 计算 5y+3x+5z与12y+7x-3z的与 5y+3x+5z+12y+7x-3z=17y+10x+2z 85, 计算8xy+3xy-2与-2xy+5xy-3的差 8xy+3xy-2-2xy+5xy-3=5xy+3xy+186, 多项式-x+3xy-y与多项式M的差是-x2-xy+y,求多项式M M=-x2+4xyy87, 当x=- ,y=-3时,求代数式3x2-2xy-3x2-2y
20、+2xy+y的值 原式=-8xy+y= 1588, 化简再求值5abc-2ab-3abc-4ab-ab-2ab,其中a=-2,b=3,c=- 原式=83abc-ab-2ab=3689, A=a-2ab+b,B=a+2ab+b1求A+B;2求(B-A); A+B=2a+2b (B-A)=ab90、 小明同学做一道题,两个多项式A,B,计算A+B,他误将A+B看作A-B,求得 9x2-2x+7,假设B=x2+3x-2,你能否扶植小明同学求得正确答案? A=10x2+x+5 A+B=11x2+4x+391, :M=3x2+2x-1,N=-x2-2+3x,求M-2N M-2N=5x24x+392、 ,
21、求3AB 3AB=11x-13xy+8y93, Ax2xyy2,B3xyx2,求2A3B 2A3B= 5x211xy2y294, (b1)20,求5ab22a2b(4ab22a2b)的值 原式=9ab24a2b=3495, 化简求值:5abc-2a2b+3abc-24ab2-a2b,其中a, b, c满足|a-1|+|b-2|+c2=0 原式=8abc-8a2b=-3296, a,b,z满足:1|x-2|+y+3=0,2z是最大的负整数,化简求值: 2x2y+xyz-3x2y-xyz-4x2y 原式=-5x2y+5xyz=9097, a+b=7,ab=10,求代数式5ab+4a+7b+6a-3ab-4ab-3b的值 原式=10a+10b-2ab=5098, m2+3mn=5,求5m2-+5m2-2m2-mn-7mn-5的值 原式=2m2+6mn+5=1599、 设A=2x2-3xy+y2+2x+2y,B=4x2-6xy+2y2-3x-y,假设|x-2a|+y-3=0,且B-2A=a,求a 的值 B-2A=-7x-5y=-14a-15=a a=-1100, 有两个多项式:A2a24a1,B2(a22a)3,当a取随意有理数时,请比拟A与B的大小 A=2a24a1 B2a24a3 所以AB第 10 页