七年级数学下册整式的加减法练习题精选强烈推荐 274Word格式.docx
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77
11
-—(k3-7k2+3)-—(3k3-9k2-6k)
46
(3k2+2k)-(4k2+5k-2)
(9a2+4a-7b)-(4a2-3a+8b)
9x2-(x2-9x+3)+(2x+1)
8y2-(x2-y)-(x2+6y2)
7
(7x2+7xy-—x)+(5x2-3xy+9x)
8
(—xy+7y2+8)-(x2-—xy+4y2-6)
78
11
(xy-—y-—)+(xy+x-3)
37
(y-5x+8z2)+(y-3x-z2)
(m2-7m-1)+(3m+4n-8)
(3x2+6x+4)-5(6x2-2x)
-9(x2+7)+7(x2+8)
-(x2y+3xy-5)-4(x2y-9xy-8)
(—x2+17x+12y)-(—x2+12x-21y)
88
-—(9k3-3k2-2)-—(4k3+7k2-6k)
66
(9k2-5k)+(7k2+4k+6)
(6a2-4a-9b)-(a2+5a+7b)
2x2+(7x2+4x+2)+(2x-1)
8y2+(3x2-y)+(9x2-8y2)
1
(8x2+2xy+—x)+(9x2+6xy+3x)
4
71
(—xy-9y2+8)+(x2+—xy-4y2-1)
64
(xy-—y-—)-(xy+x+7)
48
(4y+8x-4z2)-(2y-7x-9z2)
(7m2+5m-2)-(9m+6n+3)
(5x2+6x+2)+4(5x2+6x)
-9(x2+7)-5(x2-9)
-(x2y-3xy-3)-7(x2y-4xy-2)
(—x2+19x+14y)-(—x2+20x-11y)
44
-—(k3+8k2-4)-—(7k3+8k2+8k)
(6k2+7k)-(5k2+9k+5)
(9a2-4a+2b)+(2a2+a-4b)
3x2+(8x2+5x+6)-(4x+2)
8y2+(8x2-y)+(8x2-4y2)
(3x2-2xy-—x)+(2x2+7xy-2x)
(—xy+7y2-8)+(x2+—xy-3y2-4)
84
81
(xy-—y+—)+(xy+x+5)
75
(3y-5x-7z2)+(2y-6x+4z2)
(m2+7m+5)+(6m-3n+1)
(4x2-4x+7)-5(5x2-6x)
-9(x2-6)+7(x2-3)
-(x2y-6xy+8)-8(x2y+6xy-5)
75
(—x2+24x-10y)-(—x2-11x+23y)