七年级数学下册整式的加减法练习题精选强烈推荐 139.docx
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七年级数学下册整式的加减法练习题精选强烈推荐139
-(x2y+3xy+9)+3(x2y+3xy-6)
71
(—x2+20x+15y)+(—x2+11x-19y)
66
11
-—(3k3-2k2+8)-—(3k3+8k2-6k)
44
(6k2-3k)+(4k2-9k-8)
(7a2+7a-2b)+(3a2+a+6b)
2x2+(7x2-8x-9)-(9x+4)
y2+(x2+y)+(9x2+y2)
1
(8x2+9xy+—x)+(9x2+9xy+7x)
6
55
(—xy+9y2-6)-(x2-—xy+9y2-3)
44
23
(xy-—y-—)-(xy-x+3)
34
(7y-6x-3z2)-(y-7x+5z2)
(m2-6m-5)+(8m+4n+9)
(3x2+8x+9)+7(8x2+x)
-6(x2-9)-5(x2-5)
-(x2y-5xy-8)+6(x2y-8xy+3)
75
(—x2-13x+14y)+(—x2+11x+19y)
66
11
-—(2k3-7k2-4)+—(2k3+6k2+8k)
45
(3k2+5k)+(6k2+9k+5)
(9a2-5a-9b)+(8a2+9a-4b)
x2-(x2+4x+8)-(8x-8)
y2+(7x2+y)-(5x2-8y2)
5
(8x2+4xy-—x)-(7x2+2xy-9x)
6
13
(—xy+7y2+7)+(x2+—xy-3y2+2)
64
11
(xy+—y+—)-(xy+x+7)
63
(7y+5x-7z2)-(y+8x+3z2)
(8m2+3m+5)-(2m-8n-3)
(9x2-5x-7)+7(5x2-5x)
-6(x2+7)-9(x2+8)
-(x2y+8xy+2)-2(x2y-3xy+2)
31
(—x2+25x-15y)-(—x2+15x+15y)
44
11
-—(k3+k2-6)-—(8k3+4k2+5k)
42
(4k2+4k)-(5k2+k+3)
(6a2-a+7b)-(6a2-a+4b)
x2+(7x2+x-7)+(8x-5)
6y2-(x2-y)-(7x2-5y2)
1
(5x2+3xy-—x)+(7x2-3xy+6x)
8
52
(—xy+6y2-9)-(x2-—xy-2y2+6)
63
15
(xy+—y-—)+(xy+x+9)
74
(7y-4x-9z2)+(6y+4x-3z2)
(7m2+8m+3)+(8m-n-7)
(7x2+3x+1)-5(7x2-4x)
-6(x2+8)+4(x2+9)
-(x2y+7xy-7)-2(x2y-5xy-2)
11
(—x2+30x-13y)-(—x2-20x-14y)
77
11
-—(3k3+3k2+2)-—(3k3+8k2+5k)
46