求各六十道初一下数学题：1.化简求值2.变量图像应用题3.几何说理题

化简求值1、计算：ab-2{ab-[3a x ab-(4ab X b+0。5ab)]-4a xab}-3b X ab,其中A=1/2,B=-2/32、若AXA+BXB=5,则代数式（3A X A-2AB-B X B)-（A X A-2AB-3B X B)的值是-------。3、若-X+2y=5,那么5（X-2Y)(X-2Y)-3(X-2Y)-60的值为 （ ）A、80 B、10 C、210 D、404、已知-X+2Y=6,则3（X-2Y)(X-2Y)-5(X-2Y)+6的值是 （ ）A、84 B、144 C、72 D、360 回答1。5abc-{2的平方b-[3abc-(4ab平方-a的平方b)]}2．7x-(5x-5y)-y=______． 3．23a3bc2-15ab2c+8abc-24a3bc2-8abc=______． 4．-7x2+6x+13x2-4x-5x2=______． 5．2a-(3a-2b+2)+(3a-4b-1)=______． 6．-6x2-7x2+15x2-2x2＝______． 7．2x-(x+3y)-(-x-y)-(x-y)＝______． 8．2x+2y-[3x-2(x-y)]=______． 9．5-(1-x)-1-(x-1)=______． 10．已知A=x3-2x2+x-4,B=2x3-5x+3,计算A+B=______． 11．已知A=x3-2x2+x-4,B=2x3-5x+3,计算A-B=______． 12．若a=-0。2,b=0。5,代数式-(|a2b|-|ab2|)的值为______． 13．一个多项式减去3m4-m3-2m+5得-2m4-3m3-2m2-1,那么这个多项式等于______． 14．-(2x2-y2)-[2y2-(x2+2xy)]=______． 15．若-3a3b2与5ax-1by+2是同类项,则x=______,y=______． 16．(-y+6+3y4-y3)-(2y2-3y3+y4-7)＝______． 17．化简代数式4x2-[7x2-5x-3(1-2x+x2)]的结果是______． 18．2a-b2+c-d3=2a+( )-d3=2a-d3-( )=c-( )． 19．3a-(2a-3b)+3(a-2b)-b=______． 20．化简代数式x-[y-2x-(x+y)]等于______． 21．[5a2+( )a-7]+[( )a2-4a+( )]=a2+2a+1． 22．3x-[y-(2x+y)]=______． 23．4a2n-an-(3an-2a2n)＝______． 24．若一个多项式加上-3x2y+2x2-3xy-4得 2x2y+3xy2-x2+2xy,则这个多项式为______． 25．-5xm-xm-(-7xm)+(-3xm)=______． 26．当a=-1,b=-2时,[a-(b-c)]-[-b-(-c-a)]＝______． 27．当a=-1,b=1,c=-1时,-[b-2(-5a)]-(-3b+5c)＝______． 28．-2(3x+z)-(-6x)+(-5y+3z)=______． 29．-5an-an+1-(-7an+1)+(-3an)＝______． 30．3a-(2a-4b-6c)+3(-2c+2b)=______．31．9a2+[7a2-2a-(-a2+3a)]=______． 32．当2y-x=5时,5(x-2y)2-3(-x+2y)-100=______． (二)化简 33．(4x2-8x+5)-(x3+3x2-6x+2)． 34．(0。3x3-x2y+xy2-y3)-(-0。5x3-x2y+0。3xy2)． 35．-{2a2b-[3abc-(4ab2-a2b)]｝． 36．(5a2b+3a2b2-ab2)-(-2ab2+3a2b2+a2b)． 37．(x2-2y2-z2)-(-y2+3x2-z2)+(5x2-y2+2z2)． 38．(3a6-a4+2a5-4a3-1)-(2-a+a3-a5-a4)． 39．(4a-2b-c)-5a-[8b-2c-(a+b)]． 40．(2m-3n)-(3m-2n)+(5n+m)． 41．(3a2-4ab-5b2)-(2b2-5a2+2ab)-(-6ab)． 42．xy-(2xy-3z)+(3xy-4z)． 43．(-3x3+2x2-5x+1)-(5-6x-x2+x3)．