初中数学七年级下册计算题精选80.docx
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初中数学七年级下册计算题精选80
25
(xy+—y+—)+(xy+x-5)
34
(4y-9x+2z2)+(3y-4x-5z2)
(5k2-7k)-(6k2+5k+2)
(2a2+3a+9b)-(3a2-8a-b)
8x2-(3x2+8x+2)-(6x+3)
y2-(7x2+y)-(8x2-4y2)
8
(7x2-8xy-—x)+(7x2-7xy+5x)
7
11
(—xy+3y2-6)-(x2-—xy+9y2+3)
45
31
(xy-—y-—)+(xy+x-1)
46
(7y-5x+2z2)+(4y-4x-z2)
(9k2+8k)+(2k2+9k-8)
(7a2+7a+8b)+(8a2-7a+2b)
9x2+(8x2-9x+3)+(6x+8)
4y2-(3x2-y)-(6x2+2y2)
6
(x2+2xy-—x)+(5x2-6xy+x)
5
77
(—xy+7y2+5)+(x2+—xy-8y2-9)
68
15
(xy-—y+—)+(xy+x+3)
54
(4y-4x-5z2)-(2y-6x-4z2)
(6k2+5k)-(k2+k-6)
(2a2-9a+9b)-(2a2+4a-3b)
2x2-(4x2-9x-9)+(6x+8)
y2+(3x2-y)-(x2+3y2)
8
(x2-5xy+—x)-(9x2+7xy+9x)
7
16
(—xy-4y2-3)-(x2+—xy+7y2+1)
67
15
(xy+—y-—)-(xy+x-4)
64
(8y-9x-5z2)+(2y+4x+7z2)
(3k2-5k)-(k2+3k-5)
(a2-8a+4b)-(4a2-2a-6b)
4x2+(x2+5x+8)-(7x-8)
4y2+(4x2-y)-(4x2-9y2)
9
(9x2-6xy-—x)+(7x2+6xy+7x)
8
41
(—xy-y2+6)+(x2+—xy+4y2+1)
56
41
(xy-—y+—)+(xy+x+6)
33
(7y+4x-8z2)-(5y-4x-7z2)
(7k2+4k)-(6k2-9k-7)
(8a2-3a+9b)-(8a2+6a+8b)
8x2-(2x2+5x-2)-(4x+1)
6y2+(x2+y)+(7x2+6y2)
1
(5x2-7xy+—x)-(9x2-5xy-9x)
5
98
(—xy+6y2-8)+(x2-—xy-9y2-8)
87
24
(xy-—y+—)-(xy+x-8)
35
(8y+3x-8z2)+(5y+3x+7z2)
(k2-9k)-(5k2+k+6)
(2a2+7a-2b)-(4a2-9a-4b)
6x2-(7x2+7x+4)+(9x-7)
9y2-(9x2+y)-(x2+2y2)
9
(x2-5xy+—x)-(x2+5xy+9x)
8
14
(—xy+9y2-6)-(x2-—xy-7y2-9)
53
44
(xy-—y-—)+(xy-x-4)
53
(y-7x-8z2)-(2y-x-7z2)