七年级数学下册计算题18.docx
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七年级数学下册计算题18.docx
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七年级数学下册计算题18
(7k2-4k)+(3k2-5k-6)
(6a2-5a-6b)-(8a2+3a+6b)
7x2-(4x2-9x-4)-(2x+4)
4y2-(6x2-y)+(9x2-4y2)
1
(5x2-3xy-—x)+(4x2+9xy+2x)
8
74
(—xy+6y2-4)-(x2+—xy+8y2-5)
63
11
(xy+—y+—)-(xy-x+1)
53
(5y-8x+z2)-(6y+2x+5z2)
(6k2+7k)+(k2-7k-9)
(9a2-5a-2b)+(4a2+a+9b)
x2-(4x2-5x+7)-(4x+5)
2y2-(6x2-y)+(x2-2y2)
1
(8x2+5xy+—x)+(8x2-3xy-9x)
4
65
(—xy+y2-5)+(x2-—xy+2y2-3)
56
16
(xy+—y+—)-(xy-x-5)
65
(9y-2x-9z2)+(9y-x+z2)
(k2+8k)+(5k2-9k-2)
(3a2-8a+7b)-(9a2-7a-8b)
6x2-(2x2+2x+3)-(6x+3)
9y2+(8x2-y)-(7x2+6y2)
6
(6x2-7xy-—x)-(7x2+6xy-2x)
7
44
(—xy-5y2+3)-(x2+—xy+6y2+2)
53
54
(xy+—y+—)-(xy-x+6)
65
(9y+3x+3z2)+(6y+4x+6z2)
(6k2+4k)-(2k2-3k-3)
(4a2-7a+9b)-(5a2-5a-8b)
4x2-(7x2-7x-9)+(5x+4)
6y2-(9x2+y)+(4x2-4y2)
1
(2x2+8xy+—x)-(5x2+5xy+x)
6
84
(—xy-5y2-3)+(x2+—xy+8y2+6)
75
47
(xy-—y-—)-(xy-x-1)
58
(2y+8x-6z2)+(y+9x+4z2)
(k2+8k)-(5k2+3k+6)
(4a2-8a-3b)+(9a2+7a+6b)
9x2+(6x2-2x-9)+(9x-5)
2y2+(8x2-y)-(3x2-9y2)
1
(5x2-5xy-—x)+(5x2+2xy+6x)
4
61
(—xy+9y2-3)-(x2+—xy-4y2+1)
73
25
(xy-—y-—)-(xy+x-8)
34
(8y+7x+4z2)-(3y-7x+z2)
(4k2-6k)-(2k2-7k+5)
(7a2-6a-9b)-(a2+9a-5b)
5x2+(9x2+4x+5)+(9x+6)
y2-(2x2+y)-(3x2-6y2)
1
(7x2-5xy+—x)+(x2-6xy-2x)
6
77
(—xy-9y2-3)-(x2+—xy-4y2+3)
68
21
(xy-—y+—)-(xy-x-2)
38
(2y+7x-5z2)+(4y-7x-2z2)
(8k2+7k)+(8k2-8k-8)
(5a2-7a-2b)-(6a2+7a-2b)
9x2+(6x2-2x-6)-(3x-8)
8y2-(8x2-y)-(6x2-9y2)
1
(6x2-8xy-—x)-(2x2-6xy-x)
5
51
(—xy-4y2-7)-(x2-—xy-9y2-4)
44
15
(xy+—y-—)-(xy+x-7)
66
(3y+5x+8z2)+(7y+2x-2z2)
(6k2+2k)+(6k2-3k+6)
(9a2+a-7b)-(2a2+4a+3b)
3x2-(x2+4x+5)-(9x-8)
5y2-(4x2+y)+(2x2-2y2)
6
(9x2-6xy-—x)-(5x2+9xy+9x)
5
61
(—xy-6y2-1)-(x2+—xy+2y2-3)
74
17
(xy+—y-—)-(xy-x-5)
78
(8y+4x-3z2)-(2y-9x-8z2)
(4k2+5k)-(3k2-6k+6)
(9a2+7a-5b)-(5a2+5a+5b)
2x2+(5x2-9x+2)-(2x+2)
6y2+(6x2+y)-(5x2+y2)
6
(8x2-9xy-—x)+(x2-xy-4x)
5
97
(—xy+3y2+9)+(x2+—xy-y2+4)
88
32
(xy+—y+—)+(xy+x+7)
43
(y-6x+z2)-(9y-3x-3z2)
(k2+9k)-(9k2-9k+4)
(8a2+3a-8b)+(4a2-2a-4b)
x2+(x2+7x-4)-(9x+1)
7y2+(6x2-y)+(7x2-2y2)
3
(6x2-xy+—x)-(9x2-4xy-8x)
4
56
(—xy+y2-8)-(x2+—xy-5y2-8)
67
56
(xy+—y+—)+(xy-x-9)
67
(2y+3x-4z2)+(5y-3x-5z2)
(k2+6k)-(7k2+4k-5)
(8a2+7a-4b)-(6a2+2a-6b)
2x2-(6x2-2x+7)-(5x-3)
y2-(2x2-y)+(9x2-2y2)
5
(2x2-4xy+—x)+(5x2+5xy+7x)
6
28
(—xy+3y2+5)-(x2-—xy-y2-7)
37
15
(xy+—y-—)-(xy-x-9)
84
(3y-9x-6z2)+(9y+3x+7z2)
(2k2-5k)-(5k2+5k+3)
(3a2-a+7b)-(7a2-6a-4b)
2x2+(5x2-6x-6)-(4x+8)
y2-(8x2+y)-(2x2+9y2)
2
(7x2+3xy+—x)+(5x2+xy-9x)
3
72
(—xy+8y2+3)-(x2+—xy+4y2-5)
83
15
(xy-—y-—)+(xy-x+3)
64
(9y+x+4z2)-(8y-3x-8z2)
(k2-2k)-(7k2-3k-8)
(5a2-6a-7b)+(4a2+5a+b)
4x2-(7x2+x+4)+(9x+7)
2y2-(x2+y)+(6x2-3y2)
5
(5x2-8xy-—x)-(6x2+2xy-5x)
4
65
(—xy-y2-8)+(x2+—xy+y2+6)
54
61
(xy+—y+—)+(xy+x+6)
57
(6y+8x-8z2)+(7y+4x-5z2)
(7k2-4k)+(6k2+8k-9)
(5a2+3a-8b)-(8a2-3a+8b)
2x2+(3x2+6x+5)-(4x+4)
4y2-(6x2-y)-(9x2-2y2)
1
(4x2-8xy-—x)+(x2-2xy+6x)
5
73
(—xy+7y2+5)+(x2+—xy+6y2-8)
84
58
(xy+—y+—)+(xy+x+3)
47
(8y+5x-8z2)+(9y+7x-6z2)
(9k2-2k)+(8k2-3k-3)
(2a2+2a+2b)-(3a2+8a+6b)
9x2-(x2+9x-1)+(x-6)
6y2-(x2+y)-(2x2+5y2)
1
(6x2-4xy+—x)+(8x2-2xy+3x)
6
91
(—xy-3y2-6)+(x2-—xy-7y2-5)
84
91
(xy+—y+—)+(xy+x-6)
83
(3y+3x+8z2)+(8y-x-7z2)
(2k2+7k)+(6k2-7k+8)
(a2-2a-6b)+(9a2+9a-6b)
6x2+(7x2+4x+8)+(9x-7)
2y2+(5x2-y)-(4x2+6y2)
6
(7x2-4xy+—x)+(9x2-xy+3x)
7
47
(—xy-2y2+5)+(x2+—xy+y2-9)
58
11
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