七年级数学下册整式的加减法计算题 426Word下载.docx
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51
(—x2+29x+14y)-(—x2-20x-26y)
44
11
-—(2k3+3k2-3)-—(6k3+k2+2k)
23
(m2+2m+5)-(3m-9n-4)
(9x2+7x-5)-6(2x2-5x)
-6(x2+8)-8(x2+5)
-(x2y-5xy+9)-3(x2y-7xy+3)
15
(—x2+23x+11y)-(—x2-17x-25y)
-—(3k3-k2+7)+—(2k3+3k2-4k)
24
(5m2-5m-4)+(m+n-3)
(9x2+5x-1)-2(4x2-6x)
-4(x2-5)-8(x2-5)
-(x2y+9xy-3)+7(x2y-4xy+7)
77
(—x2+19x-13y)+(—x2+12x+23y)
88
-—(9k3-9k2+2)+—(4k3-3k2-8k)
(9m2-m-2)+(8m+3n-1)
(2x2-5x+3)+4(2x2-8x)
-4(x2+6)-8(x2-2)
-(x2y+9xy-7)-3(x2y-5xy+7)
17
(—x2-15x+15y)+(—x2+11x+25y)
-—(4k3-2k2-8)+—(k3-2k2-3k)
(3m2-8m-6)+(8m-4n-4)
(5x2+5x-3)+5(x2+2x)
-8(x2-8)+7(x2+9)
-(x2y-2xy+5)-7(x2y+7xy+2)
41
(—x2+30x-16y)+(—x2+18x+21y)
55
-—(6k3+5k2-7)-—(5k3-7k2-9k)
(2m2+6m+9)+(3m+2n-3)
(9x2+9x-7)-5(5x2-9x)
-4(x2+5)-4(x2+8)
-(x2y+4xy-3)-5(x2y-9xy-7)
(—x2+27x-19y)-(—x2+13x-22y)
-—(4k3-2k2-3)+—(6k3+3k2-3k)
63
(9m2+6m-5)-(9m+2n-4)
(4x2-3x-2)+3(5x2+7x)
-2(x2-2)+4(x2+6)
-(x2y-2xy+7)-6(x2y-2xy+9)
61
(—x2-22x-18y)+(—x2+10x-19y)
-—(3k3-5k2+3)+—(k3+2k2+8k)
64
(7m2+m-9)+(9m+2n+2)
(x2+x-2)+7(x2-5x)
-7(x2+1)-5(x2-3)