七年级数学下册整式的加减法练习题精选强烈推荐 196文档格式.docx
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5
(2x2+2xy+—x)+(5x2+8xy-9x)
6
81
(—xy+5y2-3)+(x2+—xy+6y2+7)
78
19
(xy+—y+—)-(xy+x-2)
78
(9y-6x-2z2)+(8y-6x-9z2)
(6m2+3m+9)+(4m+4n+6)
(4x2-x-5)-4(2x2+3x)
-5(x2+7)-4(x2-7)
-(x2y+4xy-6)-3(x2y+4xy-5)
15
(—x2+21x-19y)-(—x2+10x+10y)
44
11
-—(k3-3k2-1)-—(7k3-5k2+5k)
65
(2k2+k)-(k2+5k+4)
(5a2+4a+8b)-(a2-8a+b)
4x2+(x2-2x-7)+(7x+2)
5y2+(2x2+y)+(x2+3y2)
1
(8x2-xy+—x)+(3x2+4xy+7x)
4
51
(—xy+4y2+9)-(x2+—xy+2y2-6)
46
71
(xy+—y+—)-(xy+x-6)
66
(y-6x-9z2)+(y-8x+7z2)
(7m2-6m-3)-(9m+4n+2)
(x2+9x-7)-7(6x2+3x)
-9(x2-4)-2(x2-1)
-(x2y-9xy+3)-9(x2y+7xy+5)
71
(—x2-19x-11y)+(—x2-10x+23y)
66
-—(8k3+k2-8)-—(6k3+8k2+1k)
(7k2-2k)+(9k2-6k-2)
(4a2-6a-b)+(7a2+2a+8b)
8x2-(2x2-8x-9)-(5x+4)
4y2-(x2+y)+(9x2+3y2)
7
(2x2-8xy-—x)-(5x2-2xy-2x)
(—xy+2y2+2)-(x2+—xy-y2-1)
46
(xy-—y+—)-(xy+x+9)
37
(2y+2x-7z2)-(6y+6x+7z2)
(4m2+3m+9)-(7m+6n-6)
(6x2+2x+4)+9(9x2+7x)
-6(x2+5)-2(x2-4)
-(x2y-5xy+3)-6(x2y+8xy-9)
41
(—x2+24x-14y)-(—x2-18x+17y)
55
-—(7k3-8k2-8)-—(5k3-5k2+9k)
(4k2-2k)+(5k2+9k+8)
(2a2-3a-6b)-(8a2-7a-b)
9x2+(2x2-3x-1)+(6x-6)