七年级数学下册整式的加减法练习题精选强烈推荐 271.docx
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七年级数学下册整式的加减法练习题精选强烈推荐271
(3a2-9a-6b)+(5a2-2a-2b)
9x2-(x2-3x+4)+(9x+5)
4y2+(7x2-y)+(2x2+2y2)
8
(x2+4xy-—x)+(3x2-7xy+9x)
7
15
(—xy+y2-8)-(x2+—xy-6y2-4)
64
29
(xy-—y-—)-(xy-x-1)
38
(8y+6x+2z2)+(2y+6x+9z2)
(6m2-4m+7)-(2m-6n-3)
(3x2-x+7)+3(6x2+9x)
-7(x2-4)+8(x2+8)
-(x2y+5xy-5)-8(x2y-3xy-8)
14
(—x2+10x-12y)-(—x2+18x+22y)
33
11
-—(3k3-k2+9)+—(2k3+8k2+5k)
63
(5k2-2k)-(5k2-8k+6)
(7a2+6a+8b)+(a2-3a+3b)
2x2-(2x2+8x-2)-(4x-9)
3y2-(8x2-y)+(4x2-6y2)
1
(4x2+xy+—x)-(3x2-2xy+7x)
5
12
(—xy+2y2+2)-(x2-—xy-3y2+6)
63
11
(xy-—y-—)-(xy+x-4)
66
(5y-3x-5z2)+(3y+6x-7z2)
(6m2+3m+6)+(9m-5n+4)
(6x2-2x-4)+6(8x2-8x)
-8(x2+6)+7(x2-6)
-(x2y+3xy+6)+6(x2y-2xy-7)
55
(—x2-28x+14y)+(—x2-12x-24y)
66
11
-—(6k3-k2-3)+—(3k3+2k2-8k)
42
(9k2+5k)-(k2-3k-4)
(7a2-9a-7b)+(5a2+3a-2b)
3x2+(9x2-2x+1)-(6x-8)
8y2-(3x2+y)-(9x2-4y2)
6
(2x2-4xy-—x)+(7x2-3xy-2x)
5
91
(—xy-y2-8)+(x2+—xy+5y2+2)
84
14
(xy-—y+—)+(xy-x+4)
33
(3y-8x+4z2)+(y+3x+5z2)
(3m2+7m+5)+(8m-2n+5)
(8x2+4x-8)-2(3x2+x)
-2(x2-2)+5(x2-8)
-(x2y+2xy-5)-8(x2y+6xy-5)
11
(—x2+26x+20y)+(—x2+18x-15y)
77
11
-—(8k3+3k2-2)-—(8k3-5k2+6k)
63
(3k2+2k)-(8k2+4k+4)
(7a2-2a+8b)-(2a2-4a-8b)
7x2+(x2+3x+1)-(6x+3)
9y2-(5x2+y)+(7x2+2y2)