Question

整式加减计算题20道

是帮忙出20道！！！！！！谢谢了！！！！！！！！！！！

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)=______．

8．-6x2-7x2+15x2-2x2＝______．

9．2x-(x+3y)-(-x-y)-(x-y)＝______．

10．2x+2y-[3x-2(x-y)]=______．

11．5-(1-x)-1-(x-1)=______．

12．( )+(4xy+7x2-y2)=10x2-xy．

13．(4xy2-2x2y)-( )=x3-2x2y+4xy2+y3．

14．已知A=x3-2x2+x-4，B=2x3-5x+3，计算A+B=______．

15．已知A=x3-2x2+x-4，B=2x3-5x+3，计算A-B=______．

16．若a=-0.2，b=0.5，代数式-(|a2b|-|ab2|)的值为______．

17．一个多项式减去3m4-m3-2m+5得-2m4-3m3-2m2-1，那么这个多项式等于______．

18．-(2x2-y2)-[2y2-(x2+2xy)]=______．

19．若-3a3b2与5ax-1by+2是同类项，则x=______，y=______．

20．(-y+6+3y4-y3)-(2y2-3y3+y4-7)＝______．

Answer 2

85+56= 68+23= 78+45= 63+58= 54+32= 56+89=
89+78= 64+48= 13+56= 56+78=
46-13= 13-2= 36-25= 100-78= 789-45=
46-23= 45-43= 1000-365= 2010-89= 2011-654=

Answer 3

题呢？