合并同类项计算题.doc

文档介绍：(3x-5y)-(6x+7y)+(9x-2y)2a-[3b-5a-(3a-5b)]a-(a-3b+4c)+3(-c+2b)(3x2-2xy+7)-(-4x2+5xy+6)2x2-{-3x+6+[4x2-(2x2-3x+2)]}3x-7+4x=6x-2(x+1)-2(x-1)=1-3x2(x-2)-6(x-1)=3(1-x)7x-(5x-5y)-y-7x2+6x+13x2-4x-5x2y+(-2y+5)-(3y+2(2x2-3xy+4y2)+(x2+2xy-3y2)2a-(3a-2b+2)+(3a-4b-1)-6x2-7x2+15x2-2x2 3(x+1)-2(2x-1)=3x-2-3(x+1)-2(x-5)=6-2x2x-(x+3y)-(-x-y)-(x-y)2x+2y-[3x-2(x-y)]5-(1-x)-1-(x-1)(4xy+7x2-y2)-10x2-xy3a-(2a-3b)+3(a-2b)-b[a-(b-c)]-[-b-(-c-a)]x-[y-2x-(x+y)]3x-[y-(2x+y)]-2(3x+z)-(-6x)+(-5y+3z)-5an-an+1-(-7an+1)+(-3an)3a-(2a-4b-6c)+3(-2c+2b) -17-(+23)=.-7-9+(-13)=.-11+|12-(39-8)|=.-9-|5-(9-45)|=.-+-|--|=.-|-|+[-(-)]=______413-74-(-5+26).-84-(16-3)+-8-(2-+-)-(-+518)-+-(-)-+[-(7+-)].-[-(-)].(-3)2÷.(-1)2×5+(-1)×52-12×5+(-1×5)2(-2)(-3)(-36)+(-1)20×63.[+-()2]÷()3×11.()4÷()4×-(),