整式的加減題有答案

1、整式的加減50題（有答案）(1) 7-3x-4x 2+4x-8x2-15(2) 2(2a 2-9b)-3( 4a2+b)(3) 8x 2-3x-(2x 2-7x-5)+3+4xa "1(4)5 -6(2a L)3(5)2a -(5b - a) b1 ,(6) 3(2x - y) -2(4x y) 200922m -3(m - n 1) -2 - -1(8)3(x2-y2) (y2-z2)-4(z2-y2)(9)x2-x2 -x2 -(x2 7) 7 -1 -1(10) (2x-3y)+(5x+4y)?(11) (8a-7b)-(4a-5b)(12) a-(2a+b)+2(a-2b)?

2、(13) 3(5x+4)-(3x-5)(14) x+ x+(-2x-4y) ?(15) (a+4b)-(3a-6b) (16)3x2-1-2x-5+3x-x 2 ?(17) (a+4b)- (3a-6b)(18)4x+2y 5xy(19) 3ab+7 2a29ab3(20) 7x2-2x+3x-7x 2(21) -0.8a 2b-6ab-1.2a 2b+5ab+a2b,、2 213 22(22) -a - - ab - a ab - b 324(23) 6x2y+2xy-3x 2y2-7x-5yx-4y 2x2-6x2y(24) 8x + 2y+2 (5x-2y)(25) 3a- (4b-2a

3、+ 1)(26) 7m+ 3 (m+ 2n)(27) (x2-y2) -4 (2x2-3y2)，、，1(28) -4x+3 ( -x-2) 3(29) 5(2x-7y)-3 (4x-3y)(36) 3x2 4x -2x2 -x x2 -3x -1(37) 3x -5x -4(2x -1)(38) (3x-5y)-(6x+7y)+(9x-2y)(39)-1-7x+3x-7x 2(41) -3(2x3y-3x2y2+3xy3)(43) 4x2y-8xy 2+7-4x 2y+12xy2-4(44)a 2-2ab+b2+2a2+2ab - b 2(45)先化簡，再求值：3m - (5m -1) +3(

4、4 -m),其中 m = -3.(46 )化簡：7a2b+(-4a2b + 5ab2) 一(2a2b 一3ab2).1(47) 2x2 -x2 -2(x2 -3x -1) -3(x2 -1 -2x) 其中：x=-2(48) 2(ab2 -2a2b) -3(ab2-a2b)+(2ab2 -2a2b) 其中：a = 2,b = 1(49)已知：A= 4x2 -4xy+ y2 , B= x2 +xy-5y2,求(3A-2B) (2A+B)的 值。(50)若 a2 +(b+3 2 =0,求 3a2b-2ab2-2 (ab-1.5a2b) +ab+3ab2的值；整式的加減50題答案(1) 7-3x-4x

5、 2+4x-8x2-15 = -12x 2+x-8(2) 2(2a 2-9b)-3( 4a2+b) = 16a 2-21b(3) 8x 2-3x-(2x 2-7x-5)+3+4x=10x 2-8.一a 1.(4)5-6(2a +)=314a 3(5) 2a -(5b -a) b = 3 a4b1 、(6) (6)-3(2x-y) -2(4x+-y) +2009 = 14x+2y+20092m3(mn+1)2 1= m-3n+4(8)3(x2 - y2) (y2 -z2) -4(z2 - y2) = 2y2+3x2-5z22_2_ 22(9)x -x -x -(x -1) -1 -1 -1=0(

6、10) (2x-3y)+(5x+4y)=7x+y?(11) (8a-7b)-(4a-5b)=4a-2b(12) a-(2a+b)+2(a-2b尸a-5b?(13) 3(5x+4)-(3x-5)=12x-17(16) x+ x+(-2x-4y) =-4y?(17) (a+4b)-(3a-6b)=-2a+10b(17)3x 2-1-2x-5+3x-x 2 =2x 2+x -6?(17) (a+4b)- (3a-6b)=-2a+10b(18)4x+2y 5xy =-x+y ?(20) 3ab+7 2a之一9ab 3= 2a? 12ab+4(21) 7x2-2x+3x-7x 2 = x(22) -0.

7、8a 2b-6ab-1.2a 2b+5ab+3b=-a2b-ab2 O 13 OO(23) - a - aba ab - b =17 a2+0.5ab-b232412(24) 6x2y+2xy-3x 2y2-7x-5yx-4y 2x2-6x 2y=-7x 2y2 -3xy-7x(25) 8x + 2y+2 (5x-2y) =18x-2y(26) 3a- (4b-2a+ 1) =5a-4b-1(27) (x2 y2) 4 (2x2 3y2) =-7x2+11y2 1(28) -4x+3 ( 1x2) =-3x-6 3(29) 5(2x-7y)-3 (4x-3y)=-2x-26y 1 c(30)

8、2a b - a b = 2.5a2b2 1 c(31) 2a b 3a b a b=4.5 a2b 2(32) a3 a2b-ab2 a2b-ab2 b3=a3+2a2b-2ab2+b3(33) 3x2y-4xy2 -3 5x2y 2xy2 5 = 8x2y-2xy2+2 1 o(34) 2a b -3a b - a b =-0.5a2b(35) a3 -a2b ab2 a2b -ab2 b3 = a3+b3(36) 3x2 4x -2x2 -x x2 -3x -1 =2x2-1(37) 3x -5x -4(2x -1) = 6x-4(38) (3x-5y)-(6x+7y)+(9x-2y)=

9、6x-14y(39)-1-7x+3x-7x 2 = -7x 2-4x-1(40) 3(a2 -2ab)-2(ab+b2)=3a2-2b2(41) 3(2x 3y 3x2y2 + 3xy3) = 6x3y+9x2y2-9xy3)(42) 2x2 (Tx + 4x2 (3x2 x)，=x2+2x(43)4x2y-8xy 2+7-4x2y+12xy2-4= 4 xy 2 +3(44)a 2-2ab+b2+2a2+2ab - b 2=3a2(45)先化簡，再求值：3 m - (5 m -1)+3(4-m),其中m = -3.1萬 - 3535,、角牛：一m 一(一 m -1) 3(4 - m)=-m-m 1 12-3m ( )= -4m 13 2222當 m = -3 時，-4m+13 = -4乂(-3)+13 = 25(46)化簡：7a2b+(-4a2b+5ab2) -(2a2b -3ab2).解：7a2b (Ya2b 5ab2)-(2a2b-3ab2)=(74 2)a2b (5 3)ab2( )= a2b 8ab2(47) 2x2 -x2 -2(x2 -3x -1) -3(x2 -1 -2x) 其中:219原式=6x 12x5 = 2(49) 2(ab2 2a2b) 3(ab2 a2b)+(2ab2 2a2b) 其中：a = 2,b = 1原式二 ab2-3a2b = -10