初中数学七年级下册计算题精选475.docx
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初中数学七年级下册计算题精选475
1
(9x2-2xy-—x)-(5x2+2xy+6x)
4
61
(—xy-5y2+2)+(x2+—xy-y2-5)
73
81
(xy-—y+—)+(xy+x-2)
78
(2y-7x-5z2)-(y+9x+6z2)
(7k2-5k)-(8k2+3k+8)
(a2+5a-5b)-(8a2+8a-7b)
3x2+(5x2+4x+5)-(6x-7)
8y2-(9x2-y)+(9x2+4y2)
1
(4x2+5xy+—x)+(x2-8xy-3x)
6
74
(—xy-5y2-2)-(x2-—xy-9y2-5)
65
17
(xy+—y+—)-(xy+x+1)
78
(2y+5x+2z2)-(2y-5x+5z2)
(2k2+8k)-(2k2+3k+4)
(5a2+7a-8b)-(4a2+8a+b)
3x2-(x2+7x-5)+(5x-4)
4y2+(x2+y)+(3x2+7y2)
6
(3x2+4xy+—x)-(x2-xy+2x)
7
15
(—xy+5y2-2)+(x2-—xy-8y2-4)
86
87
(xy-—y+—)+(xy-x-1)
76
(3y-7x-3z2)+(4y+9x-6z2)
(3k2-7k)+(4k2-7k-4)
(7a2-a-7b)-(2a2-7a+5b)
3x2-(2x2+8x+4)-(3x+3)
3y2+(5x2-y)+(8x2-y2)
1
(3x2+4xy+—x)+(x2-3xy+x)
3
11
(—xy-9y2-3)+(x2-—xy-4y2-8)
38
18
(xy+—y-—)-(xy+x+1)
37
(2y+8x+5z2)-(2y+5x-3z2)
(3k2-k)-(7k2-4k-1)
(3a2+8a-8b)-(8a2+4a+b)
4x2-(3x2-2x-1)+(5x-1)
5y2+(5x2-y)-(9x2-5y2)
2
(6x2+3xy-—x)+(2x2-5xy-8x)
3
71
(—xy+3y2-8)-(x2+—xy+y2-1)
87
36
(xy+—y-—)+(xy+x-1)
45
(8y+7x+8z2)+(7y+9x-4z2)
(2k2-2k)+(9k2+9k-9)
(9a2-5a+8b)+(2a2+a+2b)
2x2-(9x2-8x-6)+(x-4)
7y2+(5x2+y)+(5x2-6y2)
6
(x2-9xy-—x)-(x2-9xy+x)
5
71
(—xy+6y2-8)-(x2-—xy-y2-2)
87
76
(xy+—y+—)+(xy+x+8)
87
(3y-3x-6z2)-(6y+8x+9z2)
(3k2-7k)+(4k2+6k-1)
(7a2+3a+9b)-(4a2-3a+6b)
4x2+(3x2+7x+4)-(x-9)
6y2-(3x2+y)+(x2+8y2)
8
(4x2-7xy+—x)-(3x2-8xy-6x)
7
11
(—xy-5y2+8)+(x2-—xy-6y2+2)
74