七年级数学下册整式的加减法练习题精选强烈推荐 103Word文档下载推荐.docx
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6
71
(—xy+y2-8)-(x2-—xy-9y2-2)
86
12
(xy-—y+—)+(xy-x-8)
33
(5y+5x-7z2)-(9y+7x+2z2)
(7m2+6m+2)+(7m-6n-3)
(2x2-6x-3)+7(2x2+9x)
-4(x2+8)+7(x2+9)
-(x2y+8xy-7)-8(x2y+4xy+6)
81
(—x2-26x-13y)+(—x2+19x+20y)
77
11
-—(8k3+9k2+1)-—(8k3+k2-4k)
66
(6k2-3k)+(3k2+5k-4)
(a2-6a+6b)+(6a2-4a+5b)
8x2-(9x2-4x-4)-(7x+2)
y2-(3x2-y)-(8x2+y2)
(4x2-2xy-—x)+(x2-4xy+2x)
7
(—xy-5y2-9)+(x2-—xy-7y2-2)
45
11
(xy+—y-—)-(xy-x+3)
75
(3y+3x-2z2)+(7y-8x-2z2)
(2m2-4m+3)+(6m+4n+5)
(5x2+3x+5)+3(9x2-2x)
-4(x2+9)+9(x2-7)
-(x2y+6xy+2)+9(x2y-8xy-5)
21
(—x2-22x+11y)+(—x2+13x+23y)
33
-—(6k3-9k2-8)-—(5k3+k2+9k)
25
(3k2-6k)-(2k2+4k-2)
(6a2+6a+4b)-(2a2-a-b)
3x2-(9x2-6x+3)+(x+7)
8y2-(8x2+y)-(5x2+8y2)
(5x2+4xy+—x)+(2x2+6xy-5x)
5
16
(—xy-6y2+3)+(x2+—xy+3y2+5)
47
91
(xy-—y+—)-(xy-x-7)
85
(7y-x+3z2)-(3y+2x+5z2)
(9m2+2m-5)-(8m-n+7)
(x2-3x+4)-9(9x2-5x)
-7(x2-9)-2(x2+6)
-(x2y+6xy+7)-6(x2y-2xy+5)
51
(—x2+18x+13y)-(—x2-19x-13y)
-—(9k3-5k2-5)-—(9k3-3k2+4k)
65
(4k2-4k)+(5k2-9k-6)
(7a2+4a+3b)-(4a2+5a-8b)
7x2-(5x2+9x-8)+(4x-2)
7y2-(8x2+y)-(x2-7y2)