北师大版七年级数学下册整式的加减法计算题精选 570Word格式.docx
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41
(—xy+4y2-4)-(x2+—xy-y2-8)
33
13
(xy-—y-—)-(xy+x-9)
74
(6y-8x+6z2)+(8y-4x+8z2)
(3k2+4k)-(7k2-9k-1)
(9a2+8a-b)-(9a2+7a+7b)
8x2-(3x2-x+4)+(9x-3)
9y2-(2x2-y)+(7x2-6y2)
(3x2+3xy+—x)+(9x2-2xy-9x)
15
(—xy+y2+8)+(x2-—xy-6y2+5)
66
47
(xy-—y-—)-(xy-x-9)
58
(5y-8x+3z2)-(7y+3x-4z2)
(9k2+3k)-(k2+4k-7)
(4a2-9a+6b)-(6a2+4a-9b)
5x2-(4x2-4x-6)+(x+6)
6y2+(6x2+y)-(9x2+9y2)
1
(8x2-9xy+—x)-(9x2+3xy+2x)
87
(—xy-8y2+3)-(x2-—xy+6y2-8)
76
14
(xy+—y+—)-(xy+x+3)
33
(7y+4x+2z2)+(4y+4x-9z2)
(k2+3k)+(4k2-k-8)
(3a2-3a-5b)-(3a2+5a+5b)
3x2+(2x2+3x-9)+(2x+5)
6y2-(x2-y)+(9x2-7y2)
(3x2+2xy+—x)+(5x2+3xy-6x)
4
13
(—xy-3y2-5)+(x2-—xy-2y2-6)
54
62
(xy-—y-—)+(xy-x-4)
73
(3y+3x-2z2)-(6y-5x+8z2)
(9k2+6k)-(3k2+6k+5)
(2a2+5a+6b)+(6a2-8a+b)
9x2+(8x2-8x-3)+(x+3)
8y2-(6x2-y)-(7x2-3y2)
(x2+8xy+—x)-(7x2-7xy+6x)
17
(—xy+6y2-8)+(x2+—xy+9y2-9)
78
75
(xy-—y-—)+(xy+x-3)
66
(5y+5x+9z2)-(6y-7x+8z2)
(9k2-3k)+(2k2-7k-5)
(a2+9a+b)+(5a2-7a+5b)
7x2+(x2-2x-7)-(7x+5)
4y2+(4x2-y)+(5x2-8y2)
(4x2-2xy-—x)+(9x2+3xy+8x)
6
64
(—xy+6y2+4)-(x2+—xy+5y2+7)
75
15
(xy-—y+—)-(xy-x-5)
46