北师大版七年级数学下册整式的加减法计算题精选 386.docx
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北师大版七年级数学下册整式的加减法计算题精选386
7x2-(8x2+9x+4)+(9x-2)
9y2+(x2-y)-(7x2+2y2)
1
(3x2+3xy-—x)-(5x2+xy+3x)
7
11
(—xy+3y2+1)+(x2+—xy+6y2+5)
57
11
(xy+—y-—)-(xy-x-3)
58
(7y-2x+z2)+(5y+8x-6z2)
(k2+k)+(8k2+8k+6)
(5a2+7a-8b)-(9a2+7a+7b)
2x2+(2x2+5x-3)-(8x+7)
2y2+(5x2+y)+(5x2+9y2)
1
(4x2-7xy+—x)+(9x2-2xy+9x)
3
81
(—xy+9y2-4)-(x2+—xy-y2-4)
76
86
(xy-—y+—)-(xy-x-8)
75
(7y-7x+4z2)+(9y+9x+z2)
(2k2-7k)+(5k2-4k-1)
(7a2+7a+4b)-(7a2+2a-7b)
5x2-(8x2-6x-2)-(7x+7)
y2+(7x2-y)+(6x2-4y2)
1
(4x2+2xy+—x)+(7x2+9xy-x)
6
93
(—xy+7y2+4)-(x2+—xy+5y2-5)
84
62
(xy-—y+—)-(xy-x+6)
53
(2y-2x+2z2)+(y+5x-4z2)
(9k2-9k)+(4k2-4k+1)
(7a2+3a-8b)-(7a2-3a-4b)
2x2+(3x2-5x+1)+(5x-2)
2y2-(7x2+y)-(5x2-4y2)
9
(6x2+3xy-—x)+(4x2+7xy-7x)
8
61
(—xy-5y2-8)-(x2+—xy+4y2+8)
54
51
(xy+—y-—)-(xy+x-7)
65
(7y+6x+6z2)+(9y-3x+3z2)
(3k2+7k)-(8k2-7k-2)
(7a2+3a-8b)-(2a2+a+4b)
3x2+(7x2-2x-5)+(4x+7)
6y2-(6x2-y)-(3x2-9y2)
1
(6x2-7xy-—x)+(2x2-4xy-6x)
3
74
(—xy-y2+4)+(x2-—xy-8y2+9)
65
61
(xy-—y+—)-(xy+x+8)
76
(y-6x+z2)+(5y-3x-9z2)
(5k2+k)+(5k2-6k+2)
(6a2-9a+2b)-(5a2+a+9b)
x2-(4x2-6x+1)+(7x+7)
6y2-(5x2-y)-(8x2+8y2)
5
(7x2+7xy+—x)-(x2+xy+7x)
6
81
(—xy+6y2+9)-(x2+—xy-9y2+7)
73
16
(xy-—y+—)-(xy-x+9)
35