七年级数学下册整式的加减法练习题精选强烈推荐 538Word文档格式.docx
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68
51
(xy+—y-—)+(xy-x-4)
65
(2y+x+7z2)+(2y-9x+5z2)
(4m2-2m-6)+(9m-5n-3)
(4x2+9x+7)+9(7x2+x)
-2(x2-2)+9(x2-8)
-(x2y-6xy+7)-8(x2y-8xy+8)
35
(—x2-28x+14y)+(—x2-18x-24y)
44
11
-—(6k3+4k2+3)+—(k3+3k2-7k)
42
(7k2+2k)+(6k2-k-5)
(4a2-7a-2b)+(a2+8a-9b)
3x2-(8x2-8x+8)+(8x-5)
y2+(2x2+y)-(x2+7y2)
9
(6x2+2xy+—x)+(8x2+4xy-2x)
8
15
(—xy+9y2-2)-(x2+—xy+4y2+5)
34
68
(xy-—y-—)-(xy+x-4)
57
(4y+4x-9z2)+(9y-9x-9z2)
(7m2+6m+8)-(6m-8n+5)
(6x2+3x+1)+8(2x2-7x)
-5(x2-8)-3(x2+3)
-(x2y-3xy+6)-3(x2y+3xy-6)
(—x2+13x-16y)+(—x2+18x-12y)
88
-—(3k3-8k2+4)+—(4k3-9k2-1k)
45
(5k2+3k)+(3k2-3k-3)
(5a2+6a+5b)-(8a2-a+5b)
4x2+(7x2-8x-3)-(3x-7)
6y2-(5x2-y)-(2x2+4y2)
(8x2+2xy+—x)-(5x2-6xy-5x)
(—xy+7y2+2)+(x2-—xy+5y2+2)
71
(xy+—y-—)+(xy+x-9)
(9y-8x+4z2)-(3y-8x+2z2)
(2m2+5m-6)+(9m-2n-1)
(3x2+4x-3)-7(3x2-9x)
-5(x2+1)+2(x2+9)
-(x2y-5xy+4)+3(x2y+2xy-2)
53
(—x2+16x+18y)+(—x2+14x+12y)
-—(8k3+5k2+8)-—(9k3-k2+1k)
63
(3k2-7k)-(7k2+5k+6)
(2a2-5a-4b)+(a2+3a+b)
8x2+(2x2-3x-7)+(8x+6)
5y2+(2x2-y)+(9x2-5y2)
(9x2-2xy+—x)-(5x2+7xy+x)
6
66
(—xy-6y2+4)-(x2-—xy-4y2-3)
57
15
(xy-—y+—)-(xy-x+4)
66