七年级数学下册计算题21Word文档下载推荐.docx
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七年级数学下册计算题21Word文档下载推荐.docx
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(xy+—y-—)-(xy-x-4)
45
(8y+8x-2z2)-(9y-4x+6z2)
(5k2-6k)+(8k2-3k-6)
(a2+4a+8b)-(a2+8a+6b)
2x2-(8x2+7x-2)-(7x-3)
2y2+(x2+y)+(7x2+3y2)
2
(5x2-9xy-—x)+(4x2-5xy-2x)
3
84
(—xy+7y2+6)+(x2+—xy-7y2+6)
73
31
(xy+—y+—)+(xy-x-5)
46
(5y-6x+3z2)-(2y-9x-9z2)
(4k2-5k)-(2k2+3k-9)
(6a2+5a-4b)+(9a2-2a+b)
6x2+(4x2-2x+7)-(2x-3)
9y2-(4x2+y)-(5x2+8y2)
(5x2-6xy+—x)-(4x2-xy-4x)
51
(—xy-7y2-8)-(x2+—xy+3y2+6)
44
11
(xy+—y+—)-(xy-x-9)
63
(8y+2x-4z2)+(9y+9x+9z2)
(6k2+4k)-(5k2+2k+1)
(6a2+4a+6b)-(7a2-9a+8b)
2x2-(4x2-9x-8)+(9x+8)
3y2-(4x2+y)+(8x2+4y2)
(4x2+2xy-—x)+(2x2-9xy+3x)
71
(—xy-8y2-1)+(x2-—xy-6y2+3)
67
17
(xy-—y+—)-(xy-x+6)
86
(9y+9x+4z2)-(8y-6x-9z2)
(3k2+5k)+(5k2+5k+7)
(7a2-9a+3b)+(9a2+6a+6b)
5x2-(8x2+3x-7)+(5x+5)
5y2+(6x2-y)-(x2-7y2)
(5x2+6xy+—x)+(6x2-5xy+5x)
7
61
(—xy-6y2+4)-(x2-—xy-6y2+8)
76
55
(xy+—y-—)+(xy+x+1)
44
(3y-9x+8z2)+(3y+4x-2z2)
(k2+2k)+(2k2-2k-4)
(4a2+9a-3b)+(8a2+3a+4b)
9x2-(x2-9x+1)+(x-9)
2y2-(7x2-y)-(4x2+4y2)
(7x2+5xy+—x)-(x2-6xy-6x)
6
(—xy+8y2-3)+(x2-—xy-4y2-8)
68
94
(xy+—y-—)+(xy-x-5)
83
(8y+x-9z2)+(8y-6x+8z2)
(6k2-8k)+(8k2-4k-6)
(2a2-a+4b)+(8a2-a-5b)
6x2+(4x2-2x+6)+(4x-2)
2y2+(8x2+y)+(x2+6y2)
(9x2-4xy-—x)+(4x2-7xy+7x)
49
(—xy-3y2+8)-(x2+—xy-y2-7)
58
12
(xy+—y+—)-(xy-x+9)
(5y+6x+7z2)+(7y+5x+3z2)
(6k2+k)+(4k2+k-7)
(6a2+4a-6b)+(8a2+7a-2b)
5x2-(6x2+6x-4)+(2x+5)
6y2-(9x2+y)+(6x2+y2)
(3x2+5xy-—x)-(6x2-9xy+8x)
(—xy-7y2+4)+(x2+—xy-6y2-8)
84
(xy-—y-—)+(xy+x+2)
75
(5y+5x+z2)-(4y+4x-z2)
(7k2-5k)+(7k2-7k-6)
(8a2+4a-2b)-(a2-a-4b)
5x2+(2x2+4x-3)-(x-3)
3y2+(6x2+y)-(2x2+2y2)
(2x2+6xy-—x)+(6x2-xy-6x)
11
(—xy+4y2-1)+(x2+—xy+y2+9)
47
15
(xy-—y+—)+(xy-x-2)
76
(8y-6x+9z2)+(4y+9x+9z2)
(2k2+9k)+(9k2-7k+1)
(8a2-6a+8b)-(5a2+9a-7b)
4x2-(9x2+7x+2)+(9x-2)
5y2-(2x2-y)+(2x2-6y2)
(2x2-8xy+—x)-(9x2+7xy+6x)
(—xy+5y2+2)+(x2+—xy-y2-3)
13
(xy+—y-—)-(xy+x-9)
74
(5y+6x+4z2)+(2y+7x+2z2)
(5k2-3k)+(7k2-4k+8)
(a2+8a-4b)+(a2+9a+8b)
3x2-(6x2+9x+9)+(9x+6)
7y2+(x2+y)+(3x2+4y2)
(7x2-5xy+—x)-(9x2-xy+7x)
91
(—xy+6y2-5)-(x2+—xy+2y2-5)
91
(xy-—y+—)+(xy-x-8)
(9y+5x+4z2)-(6y-x+2z2)
(7k2-8k)-(2k2-3k+7)
(7a2+5a-7b)-(7a2-2a+3b)
8x2+(7x2-6x+3)+(4x+6)
4y2-(x2+y)-(2x2+8y2)
9
(7x2-2xy+—x)-(4x2+8xy+8x)
21
(—xy-y2+3)-(x2-—xy-2y2+8)
37
53
(xy+—y+—)-(xy-x+6)
64
(y-4x-5z2)+(9y-3x-9z2)
(4k2+k)-(2k2-4k+8)
(8a2+7a+9b)-(5a2+8a-2b)
3x2-(8x2+6x-6)-(2x+9)
3y2-(3x2-y)+(3x2+9y2)
(3x2-4xy-—x)+(8x2+xy+5x)
(—xy-7y2-5)+(x2+—xy-8y2-3)
57
(xy-—y+—)+(xy-x-5)
68
(7y+x-z2)-(6y+9x+2z2)
(4k2-k)-(7k2+k-7)
(2a2+5a+9b)+(2a2-2a+2b)
2x2+(9x2-9x+3)+(3x+8)
9y2-(4x2+y)-(4x2+9y2)
(7x2+2xy-—x)-(2x2-5xy-3x)
12
(—xy-3y2+4)+(x2+—xy+4y2+5)
43
16
(xy-—y-—)-(xy+x+7)
35
(7y-9x+8z2)+(8y+8x-7z2)
(4k2+8k)-(8k2-3k-5)
(3a2-9a-b)-(3a2+8a+8b)
6x2+(3x2+5x+8)+(6x-3)
2y2+(3x2+y)+(8x2+7y2)
(3x2-9xy+—x)+(6x2-5xy-x)
14
(—xy-4y2-8)+(x2-—xy+y2-2)
85
47
(xy-—y+—)+(xy+x-1)
36
(7y-8x-z2)+(9y-4x+4z2)
(9k2-5k)+(k2+7k-9)
(9a2+7a+2b)+(4a2-2a+3b)
2x2-(9x2-8x+3)+(8x-3)
2y2+(8x2-y)+(3x2-9y2)
(8x2+5xy+—x)+(x2-4xy-8x)
(—xy+4y2+9)+(x2+—xy+5y2-3)
63
(xy+—y-—)-(xy-x+6)
(y+4x+z2)-(7y+x-7z2)
(k2+7k)-(7k2+4k-8)
(a2-a+6b)-(2a2+8a-2b)
3x2-(3x2-8x-9)-(7x+6)
2y2+(x2+y)+(6x2+7y2)
(5x2-5xy-—x)-(3x2+xy-4x)
(—xy-7y2+6)-(x2+—xy+2y2+1)
38
(xy+—y-—)+(xy+x-9)
(8y+x-z2)-(8y+9x-6z2)
(8k2-3k)-(k2+7k+6)
(9a2+6a-7b)-(a2-7a+8b)
8x2+(9x2+4x-3)+(3x+7)
3y2-(7x2-y)+(5x2-2y2)
(3x2+7xy+—x)-(9x2+9xy-2x)
(—xy-7y2+2)+(x2+—xy+3y2+3)
(xy+—y+—)-(xy-x-7)
(3y-9x-8z2)+(3y+7x+5z2)
(3k2+5k)+(7k2+2k-6)
(3a2-8a-4b)-(7a2-3a-3b)
5x2+(7x2-2x-6)+(9x-2)
9y2-(6x2-y)-(6x2-2y2)
(6x2+2xy-—x)+(4x2+5xy-x)
17
(—xy+3y2+1)+(x2-—xy-9y2-3)
48
(xy+—y+—)+(xy+x+1)
(7y+6x-5z2)+(9y+6x+6z2)
(7k2+9k)-(8k2-7k+4)
(7a2-4a-3b)-(9a2+a+3b)
9x2-(3x2+9x+6)+(4x+7)
6y2+(2x2-y)+(x2-3y2)
(9x2+7xy-—x)-(3x2-4xy-5x)
(—xy+9y2+8)+(x2-—xy-8y2+5)
56
78
(xy+—y-—)-(xy+x+1)
67
(4y-6x+7z2)-(9y-6x-9z2)
(6k2-9k)+(9k2-6k+7)
(9a2-3a+b)+(7a2+a+9b)
x2-(9x2+8x+6)+(x-2)
4y2-(3x2-y)+(3x2+5y2)
(8x2+8xy-—x)-(5x2+2xy-4x)
16
(—xy-9y2-3)-(x2+—xy-9y2-6)
75
(xy+—y+—)-(xy+x-9)
(7y+6x+3z2)+(5y+6x-7z2)
(7k2-3k)+(9k2-2k+9)
(9a2-9a-6b)-(8a2-9a+7b)
5x2+(4x2-7x-6)+(7x-5)
y2+(4x2-y)-(4x2+4y2)
(5x2-3xy+—x)+(8x2+7xy+2x)
62
(—xy-2y2-2)+(x2-—xy+5y2+5)
41
(xy+—y-—)+(xy-x-1)
(2y-6x-2z2)+(6y+2x-8z2)
(2k2-5k)-(9k2+7k-4)
(5a2-a-3b)-(7a2-3a+9b)
2x2-(4x2-x+2)+(x-4)
y2+(4x2-y)-(x2-3y2)
(2x2+5xy+—x)+(5x2-6xy+4x)
(—xy-6y2-3)-(x2+—xy+9y2-8)
33
(xy+—y-—)-(xy-x+7)
(6y-6x-9z2)+(y-4x-9z2)
(4k2+8k)+(7k2+8k-7)
(7a2-8a+2b)+(4a2-9a-2b)
x2+(x2+8x-5)+(3x-1)
y2+(5x2-y)-(2x2+2y2)
(4x2-3xy+—x)-(3x2+7xy+5x)
27
(—xy-9y2+5)+(x2-—xy-5y2+1)
65
(xy+—y+—)-(xy+x-4)
(8y+x-2z2)-(6y-x+9z2)
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