Question

不加括号的合并同类项计算题

不加括号的合并同类项计算题

Answer 1

1．3ab-4ab+8ab-7ab+ab=______．2．7x-(5x-5y)-y=______．3．23a3bc2-15ab2c+8abc-24a3bc2-8abc=______．4．-7x2+6x+13x2-4x-5x2=______．5．2y+(-2y+5)-(3y+2)＝______．6．(2x2-3xy+4y2)+(x2+2xy-3y2)=______．7．2a-(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______．