合并同類項(xiàng)計(jì)算題

PAGEPAGE4合并同類項(xiàng)計(jì)算題1．a(chǎn)-(a-3b+4c)+3(-c+2b)2.(3x2-2xy+7)-(-4x2+5xy+6)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，計(jì)算A+B=______．22．已知A=x3-2x2+x-4，B=2x3-5x+3，計(jì)算A-B=______．23．若a=-0.2，b=0.5，代數(shù)式-(|a2b|-|ab2|)的值為______．25．一個(gè)多項(xiàng)式減去3m4-m3-2m+5得-2m4-3m3-2m2-1，那么這個(gè)多項(xiàng)式等于______．26．-(2x2-y2)-[2y2-(x2+2xy)]=______．27．若-3a3b2與5ax-1by+2是同類項(xiàng)，則x=______，y=______．28．(-y+6+3y4-y3)-(2y2-3y3+y4-7)＝______．29．化簡代數(shù)式4x2-[7x2-5x-3(1-2x+x2)]的結(jié)果是______．30．2a-b2+c-d3=2a+()-d3=2a-d3-()=c-()．31．3a-(2a-3b)+3(a-2b)-b=______．32．化簡代數(shù)式x-[y-2x-(x+y)]等于______．33．[5a2+()a-7]+[()a2-4a+()]=a2+2a+1．34．3x-[y-(2x+y)]=______．35．化簡|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，化簡|x+y|-|5-x-y|=______．38．4a2n-an-(3an-2a2n)＝______．39．若一個(gè)多項(xiàng)式加上-3x2y+2x2-3xy-4得2x2y+3xy2-x2+2xy，則這個(gè)多項(xiàng)式為______．40．-5xm-xm-(-7xm)+(-3xm)=______．41．當(dāng)a=-1，b=-2時(shí)，[a-(b-c)]-[-b-(-c-a)]＝______．43．當(dāng)a=-1，b=1，c=-1時(shí)，-[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．當(dāng)2y-x=5時(shí)，5(x-2y)2-3(-x+2y)-100=______．131．將x2-8x+2x3-13x2-2x-2x3+3先合并同類項(xiàng)，再求值，其中x=-4．132．在括號內(nèi)填上適當(dāng)?shù)捻?xiàng)：[()-9y+()]+2y2+3y-4=11y2-()+13．133．在括號內(nèi)填上適當(dāng)?shù)捻?xiàng)：(-x+y+z)(x+y-z)=[y-()][y+()]．134．在括號內(nèi)填上適當(dāng)?shù)捻?xiàng)：(3x2+xy-7y2)-()=y2-2xy-x2．135．在括號內(nèi)填上適當(dāng)?shù)捻?xiàng)：(1)x2-xy+y-1=x2-()；(2)[()+6x-7]-[4x2+()-()]=x2-2x+1．136．計(jì)算4x2-3[x+4(1-x)-x2]-2(4x2-1)的值．137．化簡：138．用豎式計(jì)算(-x+5+2x4-6x3)-(3x4+2x2-3x3-7)．139．已知A=11x3+8x2-6x+2，B=7x3-x2+x+3，求2(3A-2B)．140．已知A=x3-5x2，B=x3-11x+6，C=4x-3，求(1)A-B-C；(2)(A-B-C)-(A-B+C)．1