七年级数学下册整式的加减法计算题 207.docx
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七年级数学下册整式的加减法计算题207
6y2-(2x2-y)-(7x2-4y2)
3
(2x2-4xy-—x)-(7x2-6xy+3x)
4
71
(—xy-y2-5)-(x2-—xy+4y2+9)
66
51
(xy+—y-—)+(xy+x-5)
44
(7y+7x+2z2)+(6y-5x+2z2)
(4k2-6k)+(5k2-3k+1)
(6a2+8a-6b)+(a2-5a+7b)
9x2-(2x2+8x+2)+(7x+1)
2y2-(6x2-y)+(5x2-7y2)
1
(3x2-5xy-—x)+(x2+7xy-7x)
6
81
(—xy+6y2+3)-(x2+—xy-9y2-3)
74
61
(xy-—y+—)-(xy-x-3)
76
(y+5x-z2)+(y-x+3z2)
(k2+2k)+(5k2+7k-1)
(8a2+8a+7b)-(a2-5a-b)
4x2+(x2-2x-7)-(3x-4)
5y2-(3x2+y)+(4x2-8y2)
1
(3x2+9xy-—x)+(3x2-xy-9x)
6
85
(—xy+3y2-1)-(x2-—xy+2y2+7)
76
41
(xy+—y+—)+(xy-x+9)
33
(2y+9x-6z2)-(7y+2x-5z2)
(7k2-k)+(2k2-k-6)
(4a2-5a+b)-(6a2-7a-3b)
8x2+(7x2+9x+5)-(9x+8)
9y2-(4x2-y)+(4x2+y2)
1
(4x2+2xy+—x)+(9x2-2xy-9x)
8
76
(—xy+2y2-3)-(x2-—xy+6y2-5)
85
21
(xy+—y-—)+(xy-x-8)
35
(3y-x+2z2)+(5y+6x-4z2)
(9k2+7k)+(9k2-4k-1)
(9a2+6a-6b)-(9a2-2a-2b)
x2-(x2+7x-1)-(7x-5)
6y2+(9x2-y)+(6x2+5y2)
1
(2x2-7xy+—x)+(9x2+7xy+5x)
8
62
(—xy-3y2+1)+(x2+—xy+6y2-4)
73
41
(xy-—y+—)+(xy-x+1)
55
(8y+9x+4z2)+(2y-3x-4z2)
(k2-2k)-(9k2+2k+7)
(5a2-3a+9b)+(2a2-7a-5b)
5x2-(7x2-x-7)-(9x-8)
7y2+(7x2+y)+(7x2-y2)
1
(3x2-8xy-—x)+(7x2-2xy+7x)
3
31
(—xy-4y2+2)-(x2-—xy+7y2+7)
48
11
(xy+—y-—)-(xy-x-8)
88
(3y+3x-4z2)-(7y+9x+3z2)