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初一上册100道数学计算题及答案。

2x+17=35 3x-67=11 12+8x=52 0.8x-4.2=2.2 2x+5=10 3x-15=75 4x+40=320 3x+77=122 5x-1.6=0.6 6x-4=20 10x-0.6=2.4 500-12x=140 1) 66x+17y=3967 25x+y=1200 答案:x=48 y=47 (2) 18x+23y=2303 74x-y=1998 答案:x=27 y=79 (3) 44x+90y=7796 44x+y=3476 答案:x=79 y=48 (4) 76x-66y=4082 30x-y=2940 答案:x=98 y=51 (5) 67x+54y=8546 71x-y=5680 答案:x=80 y=59 (6) 42x-95y=-1410 21x-y=1575 答案:x=75 y=48 (7) 47x-40y=853 34x-y=2006 答案:x=59 y=48 (8) 19x-32y=-1786 75x+y=4950 答案:x=66 y=95 (9) 97x+24y=7202 58x-y=2900 答案:x=50 y=98 (10) 42x+85y=6362 63x-y=1638 答案:x=26 y=62 (11) 85x-92y=-2518 27x-y=486 答案:x=18 y=44 (12) 79x+40y=2419 56x-y=1176 答案:x=21 y=19 (13) 80x-87y=2156 22x-y=880 答案:x=40 y=12 (14) 32x+62y=5134 57x+y=2850 答案:x=50 y=57

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初一整式化简计算题100道(带答案)

1、a+(2b-3c-4d)=_________;2、a-(-2b-3c+4d)=________;3、(m-n)-3(z-p)=________;4、3x-[5x-(2x-1)]=________;5、4x2-[6x-(5x-8)-x2]=___________;二、化简(28分)1、(1)(3x+5y)+(5x-7y)-2(2x-4y);(2)5ab-{1、a+(2b-3c-4d)=2、a-(-2b-3c+4d)=3、(m-n)-3(z-p)=4、3x-[5x-(2x-1)]=5、4x2-[6x-(5x-8)-x2]=6、(3x+5y)+(5x-7y)-2(2x-4y);7、5ab+[2a2b+(a2b-3ab)]-2a2b}三、化简后求值(16分)(2x2-x-1)-(x2-x- )+3(x2-1 ),其中x=1 .四、1、7x-3y-4z=-(_________);2、a2-2ab-a-b=a2-2ab-(_________);3、5x3-4x2+2x-3=5x3-(_________)-3;4、a3-a2b+ab2=-(_______)+ab2=a3-(________);5、5a2-6a+9b=5a2-3(_____)=-6a-(______);6、x3-3x2y+3xy2-y3=x3-3x2y-(_____)=x3-y3-(______);五、(1)(x3-4x2y+5xy2-3y3)-(-2xy2-4x3+x2y);(2)一个多项式减去3a4-a3+2a-1得5a4+3a2-7a+2,求这个多项式.六、先化简下列各式,再求值(45分)(1) x-2(x- )+3( x+ ),其中x=-4;(2)(3xy-2x2)-(2x2-y2)-(y2-2xy)+(-y2+5x2+xy),其中x= ,y=- ;(3)5xyz-{2x2y-[3xyz-(4xy2-x2y)]}其中x=-2,y=-1,z=31、5y+2x-(5y-2x) 2、x(x-y)+x(y-x) 3、(x-y)2-(x-y)4、(2x-y)2-2(2x-y)+1 5、3(2x+y)2+2(2x+y)6、7x-(5x-5y)-y 7、2x-(3x-2y+2)+(3x-4y-1) 8、2x+2y-[3x-2(x-y)]9、a+[a+b+c]-[b-a] 10、a×[b+c]-a[b-c] 11、a+b+(b-a)-b-a12、{[a÷b]×{b÷a+1]}×{b÷a} 13、(3a+b)2 14、(-x+3y)215、(a+b)(a-b) 16、(-a-b)2 17、(2x+ )218、(3x+5y)+(5x-7y)-2(2x-4y) 19、(3x+5y)+(5x-7y)+2(2x-4y)20、2(2a-3b)+3(2b-3a)化间求值: 1、-9(x-2)-y(x-5) (1)化简整个式子. (2)当x=5时,求y的解. 2、5(9+a)×b-5(5+b)×a (1)化简整个式子. (2)当a=5/7时,求式子的值. 3、62g+62(g+b)-b (1)化简整个式子. (2)当g=5/7时,求b的解. 4、3(x+y)-5(4+x)+2y (1)化简整个式子. 5、(x+y)(x-y) (1)化简整个式子. 6、2ab+a×a-b (1)化简整个式子. 7、5.6x+4(x+y)-y (1)化简整个式子. 8、6.4(x+2.9)-y+2(x-y) (1)化简整个式子. 9、(2.5+x)(5.2+y) (1)化简整个式子. 3.3ab-4ab+8ab-7ab+ab=______. 4.7x-(5x-5y)-y=______. 5.23a3bc2-15ab2c+8abc-24a3bc2-8abc=______. 6.-7x2+6x+13x2-4x-5x2=______. 7.2y+(-2y+5)-(3y+2)=______. 11.(2x2-3xy+4y2)+(x2+2xy-3y2)=______. 12.2a-(3a-2b+2)+(3a-4b-1)=______. 13.-6x2-7x2+15x2-2x2=______. 14.2x-(x+3y)-(-x-y)-(x-y)=______. 16.2x+2y-[3x-2(x-y)]=______. 17.5-(1-x)-1-(x-1)=______. 18.( )+(4xy+7x2-y2)=10x2-xy. 19.(4xy2-2x2y)-( )=x3-2x2y+4xy2+y3. 21.已知A=x3-2x2+x-4,B=2x3-5x+3,计算A+B=______. 22.已知A=x3-2x2+x-4,B=2x3-5x+3,计算A-B=______. 23.若a=-0.2,b=0.5,代数式-(|a2b|-|ab2|)的值为______. 25.一个多项式减去3m4-m3-2m+5得-2m4-3m3-2m2-1,那么这个多项式等于______. 26.-(2x2-y2)-[2y2-(x2+2xy)]=______. 27.若-3a3b2与5ax-1by+2是同类项,则x=______,y=______. 28.(-y+6+3y4-y3)-(2y2-3y3+y4-7)=______. 29.化简代数式4x2-[7x2-5x-3(1-2x+x2)]的结果是______. 30.2a-b2+c-d3=2a+( )-d3=2a-d3-( )=c-( ). 31.3a-(2a-3b)+3(a-2b)-b=______. 32.化简代数式x-[y-2x-(x+y)]等于______. 33.[5a2+( )a-7]+[( )a2-4a+( )]=a2+2a+1. 34.3x-[y-(2x+y)]=______. 35.化简|1-x+y|-|x-y|(其中x<0,y>0)等于______. 36.已知x≤y,x+y-|x-y|=______. 37.已知x<0,y<0,化简|x+y|-|5-x-y|=______. 38.4a2n-an-(3an-2a2n)=______. 39.若一个多项式加上-3x2y+2x2-3xy-4得 2x2y+3xy2-x2+2xy, 则这个多项式为______. 40.-5xm-xm-(-7xm)+(-3xm)=______. 41.当a=-1,b=-2时, [a-(b-c)]-[-b-(-c-a)]=______. 43.当a=-1,b=1,c=-1时, -[b-2(-5a)]-(-3b+5c)=______. 44.-2(3x+z)-(-6x)+(-5y+3z)=______. 45.-5an-an+1-(-7an+1)+(-3an)=______. 46.3a-(2a-4b-6c)+3(-2c+2b)=______. 48.9a2+[7a2-2a-(-a2+3a)]=______. 50.当2y-x=5时,5(x-2y)2-3(-x+2y)-100=______.

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