北师大版七年级数学下册整式的加减法计算题精选 394Word格式.docx
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11
(—xy-8y2-6)+(x2-—xy-7y2+6)
43
61
(xy+—y-—)+(xy-x+8)
78
(6y+8x-9z2)+(5y+3x+6z2)
(5k2-8k)-(8k2-6k-1)
(9a2-9a-9b)-(9a2+6a+3b)
4x2+(9x2+2x-9)+(8x-7)
7y2-(3x2+y)-(3x2-5y2)
6
(2x2-5xy+—x)-(9x2+8xy+3x)
5
15
(—xy-5y2+9)+(x2+—xy-7y2-4)
86
34
(xy+—y-—)+(xy-x-2)
45
(7y-7x+7z2)-(9y+4x-6z2)
(3k2-9k)+(6k2+4k+4)
(9a2+9a-5b)+(5a2-9a+7b)
9x2+(6x2-x-4)-(8x+6)
9y2-(9x2-y)-(3x2+8y2)
(8x2-xy+—x)+(5x2-xy+7x)
7
57
(—xy-6y2-5)+(x2-—xy+6y2+1)
48
31
(xy+—y+—)-(xy+x+1)
47
(7y-4x-5z2)+(4y+4x-7z2)
(7k2-6k)+(6k2+2k+1)
(8a2+4a+8b)-(a2-a+8b)
9x2+(2x2+6x+1)+(7x-8)
y2-(9x2+y)+(6x2-6y2)
(5x2-4xy-—x)+(2x2+8xy+7x)
81
(—xy-7y2+7)-(x2+—xy-y2+3)
75
81
(xy+—y+—)-(xy-x-6)
77
(2y-4x+9z2)+(8y-6x+6z2)
(7k2+4k)-(2k2-8k-4)
(2a2+8a+3b)+(3a2-3a-b)
8x2-(9x2+5x-3)+(5x+9)
6y2+(6x2+y)+(9x2+8y2)
(4x2-2xy+—x)+(9x2-xy-3x)
61
(—xy+6y2+9)+(x2-—xy-6y2-9)
73
19
(xy-—y-—)-(xy+x-5)
38
(9y+3x+9z2)+(7y+5x-6z2)
(6k2+2k)+(6k2-k-8)
(8a2+7a+b)+(2a2+7a+4b)
5x2+(x2-6x-1)+(8x+1)
5y2-(9x2-y)+(9x2-9y2)
(2x2+7xy-—x)-(x2-7xy+4x)
45
(—xy+8y2+6)+(x2+—xy-y2-1)
54
51
(xy-—y+—)+(xy+x-8)
48