七年级数学下册整式的加减法计算题 269.docx
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七年级数学下册整式的加减法计算题269
-(x2y-8xy+9)-8(x2y+6xy-5)
91
(—x2+28x-11y)+(—x2+10x+28y)
88
11
-—(4k3-k2+8)+—(7k3-6k2-2k)
23
(5m2-m-8)+(3m-4n+9)
(5x2-5x+7)+2(9x2+6x)
-4(x2-7)+6(x2+3)
-(x2y+3xy-2)-9(x2y-6xy-7)
11
(—x2-26x-20y)+(—x2+18x+28y)
66
11
-—(3k3-2k2+4)+—(2k3-6k2-9k)
66
(m2+8m+9)-(2m+9n+8)
(7x2-5x-5)-7(7x2-7x)
-6(x2-3)+6(x2-9)
-(x2y+8xy+9)+2(x2y-2xy+6)
11
(—x2-10x+12y)-(—x2-14x+12y)
77
11
-—(7k3+6k2+4)+—(6k3+2k2+8k)
63
(6m2-5m-3)+(5m-6n+7)
(8x2+2x+9)+3(7x2-6x)
-5(x2+6)-8(x2+9)
-(x2y-9xy-3)+4(x2y-3xy+9)
11
(—x2+15x+20y)-(—x2+20x-25y)
44
11
-—(9k3-4k2-2)-—(4k3-6k2-3k)
24
(2m2+3m+4)-(2m-9n+5)
(8x2+5x-3)+2(3x2-5x)
-3(x2-6)-9(x2+3)
-(x2y+5xy-8)+5(x2y-4xy+7)
41
(—x2+24x+13y)-(—x2-20x+23y)
33
11
-—(9k3+3k2+3)+—(9k3+7k2-1k)
45
(9m2+6m-3)-(8m+2n-5)
(6x2+5x-8)+9(x2+x)
-3(x2-3)-8(x2-3)
-(x2y-8xy-8)+3(x2y+2xy-3)
31
(—x2+23x+11y)-(—x2+13x-24y)
44
11
-—(5k3-7k2-8)+—(6k3-5k2-3k)
22
(9m2-8m-7)-(8m+8n+2)
(9x2+8x+4)+7(4x2+8x)
-4(x2-1)-6(x2+7)
-(x2y-7xy-2)+4(x2y-2xy-9)
14
(—x2+18x-14y)+(—x2+17x-10y)
55
11
-—(5k3-5k2+2)-—(8k3-7k2-1k)
43
(9m2-4m-4)-(6m-6n+6)
(3x2+6x-3)-5(5x2+6x)
-5(x2+5)+7(x2-5)
-(x2y-8xy-7)+8(x2y-6xy+3)
44
(—x2-26x-14y)-(—x2-19x-21y)
55
11
-—(7k3-3k2+9)+—(6k3+k2-8k)
62