七年级数学下册整式的加减法练习题精选强烈推荐 20Word格式文档下载.docx
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(—xy-8y2-7)+(x2+—xy+9y2-8)
54
13
(xy-—y-—)-(xy-x-5)
54
(5y+9x-7z2)+(8y+3x-z2)
(2m2-3m+5)-(9m+5n-7)
(x2-7x+7)+9(7x2-3x)
-9(x2+8)-2(x2+5)
-(x2y-6xy+4)-5(x2y+3xy+2)
11
(—x2+14x-15y)-(—x2+12x+23y)
44
-—(7k3-6k2-8)-—(8k3-k2-6k)
(3k2+6k)+(2k2-3k+4)
(2a2+7a-8b)-(3a2-a-3b)
3x2-(9x2-8x-1)-(9x-9)
y2+(2x2+y)+(x2+5y2)
1
(8x2-xy+—x)-(6x2-8xy-2x)
35
(—xy+7y2+2)-(x2+—xy-7y2+2)
46
41
(xy+—y-—)+(xy+x+4)
38
(4y-6x+2z2)-(6y-4x+z2)
(4m2+3m+4)-(5m-4n-8)
(2x2-4x-7)-4(7x2-6x)
-6(x2+4)+5(x2-8)
-(x2y+2xy+8)+5(x2y+4xy-2)
(—x2+11x-16y)-(—x2-11x-16y)
77
-—(8k3-9k2+3)-—(9k3+9k2+2k)
(8k2-4k)+(6k2+4k-4)
(7a2-7a+b)+(3a2+5a+8b)
2x2-(7x2+6x-6)+(5x+6)
3y2+(7x2+y)+(9x2+y2)
(5x2+7xy-—x)+(4x2-7xy+5x)
(—xy+8y2+7)+(x2+—xy+9y2-3)
45
(xy+—y+—)-(xy+x+5)
74
(6y-3x+9z2)-(7y+9x-5z2)
(5m2-3m+7)+(m+3n+7)
(2x2-2x+2)-3(7x2+3x)
-4(x2+3)-8(x2-9)
-(x2y+2xy+4)-4(x2y-8xy+2)
81
(—x2-29x-10y)+(—x2-19x-23y)
-—(7k3+7k2-8)+—(6k3+5k2+3k)
24
(5k2+4k)+(7k2+7k-9)
(3a2-9a-6b)-(5a2-7a-9b)
3x2+(6x2-x-7)-(7x-4)
6y2-(6x2+y)-(4x2+8y2)
(7x2-6xy+—x)+(3x2+8xy-x)
91
(—xy-7y2+6)-(x2-—xy-9y2-6)
85
94
(xy-—y+—)-(xy+x-9)
85