七年级数学下册整式的加减法计算题 239.docx
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七年级数学下册整式的加减法计算题239
-(x2y-7xy+7)-6(x2y-2xy-4)
33
(—x2-14x-12y)+(—x2+10x-30y)
44
11
-—(3k3+2k2+1)+—(5k3+9k2-1k)
23
(6m2+8m-8)-(4m+7n-2)
(6x2+8x-7)+3(5x2+2x)
-3(x2-8)-9(x2+8)
-(x2y-9xy+9)-9(x2y-7xy-9)
21
(—x2-25x+14y)+(—x2+11x-17y)
33
11
-—(4k3+4k2+6)-—(4k3+k2+1k)
62
(4m2+m+6)+(9m-n-4)
(5x2-6x+4)-6(4x2-x)
-5(x2+9)-6(x2+6)
-(x2y+3xy+7)+8(x2y+5xy+8)
18
(—x2+27x+18y)-(—x2+15x-25y)
77
11
-—(3k3-4k2-8)+—(7k3+k2-8k)
44
(8m2-8m-8)+(5m-2n-9)
(4x2+4x-9)-5(5x2-9x)
-9(x2+9)+7(x2-3)
-(x2y-6xy-4)+4(x2y+5xy-6)
51
(—x2-10x-19y)-(—x2+10x+10y)
44
11
-—(k3+4k2+4)+—(9k3+6k2-3k)
63
(2m2+4m+8)-(5m+6n+5)
(8x2-4x+9)+2(3x2-9x)
-5(x2+9)+3(x2+7)
-(x2y-3xy-7)+4(x2y-9xy-6)
51
(—x2+15x+18y)+(—x2-11x-26y)
44
11
-—(3k3+9k2-8)-—(8k3-9k2+3k)
63
(4m2-6m+8)+(4m+5n+2)
(7x2+8x+2)+4(5x2+9x)
-3(x2+1)+4(x2-5)
-(x2y+7xy-8)+6(x2y+4xy-4)
15
(—x2+12x+16y)+(—x2+17x-13y)
44
11
-—(2k3+2k2-1)+—(k3+9k2+6k)
64
(m2-9m-1)-(8m-5n-1)
(9x2+8x-3)+7(7x2-4x)
-5(x2+4)-9(x2-1)
-(x2y-6xy+3)+2(x2y+2xy-3)
21
(—x2+10x-17y)+(—x2+12x+29y)
33
11
-—(4k3-k2-2)-—(9k3-6k2-9k)
26
(2m2+9m-8)+(5m-8n+5)
(x2+3x+1)+5(5x2-3x)
-3(x2+3)-4(x2+4)
-(x2y-8xy-5)-5(x2y+5xy-4)
11
(—x2+27x+19y)+(—x2-18x-30y)
88
11
-—(5k3+8k2-8)-—(8k3-k2-2k)
42