七年级数学下册整式的加减法练习题精选强烈推荐 72Word文件下载.docx
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(x2-6x-9)+9(7x2+4x)
-6(x2-2)+5(x2+6)
-(x2y-8xy-4)-4(x2y-6xy-4)
16
(—x2-20x+14y)-(—x2+19x-17y)
77
11
-—(9k3+7k2-2)+—(4k3+3k2-7k)
26
(6k2-9k)-(2k2-9k-9)
(3a2-7a+2b)+(3a2-4a+7b)
7x2+(7x2-3x+7)-(4x+5)
3y2+(9x2-y)+(5x2-4y2)
6
(7x2-xy+—x)-(8x2-xy-x)
5
51
(—xy-7y2-9)+(x2-—xy-8y2-8)
48
11
(xy+—y+—)+(xy-x+9)
58
(6y+2x+8z2)+(7y-5x-5z2)
(6m2-4m-5)+(2m+5n-6)
(6x2+x+8)-7(5x2-8x)
-3(x2+3)-6(x2+2)
-(x2y+9xy+6)+9(x2y-4xy-8)
(—x2-20x+15y)+(—x2+11x-16y)
33
-—(6k3-8k2-1)+—(4k3+3k2+6k)
65
(3k2-k)+(k2-7k-5)
(2a2+2a-b)+(a2+8a-4b)
8x2+(x2-4x+4)+(x+2)
5y2-(x2-y)+(5x2+7y2)
7
(8x2-3xy-—x)+(3x2-4xy+5x)
8
(—xy+4y2-4)-(x2-—xy-y2-8)
75
23
(xy+—y-—)+(xy+x-4)
34
(3y-x+z2)+(2y+7x-9z2)
(2m2+m-6)-(9m+4n+3)
(5x2-3x+9)-3(2x2-4x)
-5(x2+2)-3(x2+7)
-(x2y-4xy+5)-9(x2y-8xy-4)
14
(—x2+13x-12y)+(—x2-12x+13y)
55
-—(9k3-2k2-6)-—(4k3-6k2+7k)
46
(9k2+2k)-(9k2-8k-2)
(5a2+5a+b)+(3a2+3a-3b)
8x2+(x2-7x+4)-(2x-7)
6y2+(x2-y)+(3x2-6y2)
1
(7x2+3xy-—x)+(2x2+2xy-5x)
71
(—xy+9y2-7)-(x2+—xy-7y2-4)
87
91
(xy+—y-—)+(xy+x+2)
(5y+7x+9z2)-(4y-6x+6z2)
(m2-5m-3)-(9m+8n+6)