七年级数学下册整式的加减法计算题 345.docx
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七年级数学下册整式的加减法计算题345
71
(—xy+5y2-7)-(x2-—xy-9y2+3)
83
16
(xy+—y+—)-(xy-x-1)
47
(7y+8x-9z2)+(8y+2x-2z2)
(7k2+8k)-(6k2-k+5)
(8a2-2a+6b)-(8a2-3a+7b)
2x2-(2x2+3x-3)-(8x-5)
6y2+(3x2-y)-(9x2-8y2)
1
(7x2-7xy+—x)-(2x2-5xy-3x)
8
15
(—xy-5y2-5)-(x2-—xy-4y2+1)
44
15
(xy+—y-—)+(xy+x+2)
44
(9y+5x+8z2)-(6y+7x+4z2)
(9k2+4k)+(7k2+2k-5)
(3a2-2a+5b)+(6a2-4a-8b)
5x2+(5x2+5x+6)-(8x+5)
y2-(4x2-y)-(5x2+5y2)
6
(3x2+8xy+—x)+(4x2+7xy+3x)
5
91
(—xy-9y2-1)-(x2-—xy+8y2+3)
88
17
(xy+—y+—)-(xy+x+9)
48
(7y-x+5z2)-(7y-4x+9z2)
(5k2-3k)-(k2+7k+3)
(3a2+4a+2b)+(9a2+2a+3b)
4x2-(3x2-x+1)-(6x+7)
4y2+(9x2+y)+(8x2-4y2)
5
(3x2+6xy+—x)+(3x2+3xy+6x)
6
11
(—xy+4y2+6)+(x2-—xy+5y2+5)
74
98
(xy-—y+—)+(xy-x-3)
87
(2y-3x-5z2)-(4y+8x+8z2)
(3k2+5k)+(5k2-7k-3)
(8a2+5a+4b)+(8a2-7a+5b)
2x2-(9x2+7x+1)+(6x+1)
y2+(x2+y)-(x2-2y2)
9
(x2+2xy-—x)-(2x2+2xy-7x)
8
11
(—xy-2y2-7)-(x2+—xy+9y2+9)
56
19
(xy+—y-—)-(xy+x+2)
58
(8y+7x+4z2)+(7y-8x+7z2)
(6k2-2k)+(6k2-4k+7)
(4a2-9a+9b)-(3a2-5a-b)
5x2-(5x2-6x+4)+(9x+6)
3y2+(9x2-y)-(6x2+4y2)
3
(3x2-3xy+—x)-(7x2+xy-8x)
4
11
(—xy+5y2+5)+(x2-—xy-3y2-1)
36
75
(xy+—y-—)-(xy-x+4)
66
(9y+8x-4z2)+(5y-2x-8z2)
(5k2+3k)+(k2+6k-4)
(3a2-6a+4b)+(2a2+2a+5b)