七年级数学下册整式的加减法计算题 465.docx
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七年级数学下册整式的加减法计算题465
-(x2y+9xy-8)+4(x2y-2xy+9)
61
(—x2-21x+18y)+(—x2+20x+11y)
55
11
-—(7k3+2k2-6)-—(5k3-3k2+4k)
64
(8m2+9m-7)+(7m-8n+7)
(6x2-x-7)+7(3x2+4x)
-5(x2+7)+2(x2+9)
-(x2y+8xy-2)-7(x2y-4xy-8)
31
(—x2+19x-18y)-(—x2-12x-27y)
44
11
-—(6k3+5k2+2)+—(8k3+5k2-7k)
66
(5m2+3m+2)-(2m-2n+1)
(7x2-9x-3)-5(5x2+7x)
-6(x2-6)+2(x2+2)
-(x2y-9xy+8)+5(x2y+3xy-8)
41
(—x2-28x-20y)-(—x2+17x+21y)
55
11
-—(8k3-8k2-5)+—(6k3-4k2+8k)
23
(2m2+7m-8)+(m+6n+1)
(4x2-2x-7)+4(5x2+8x)
-7(x2-1)-2(x2-5)
-(x2y+3xy-9)-4(x2y+4xy-6)
11
(—x2+10x-18y)+(—x2+19x+21y)
66
11
-—(4k3+5k2+7)+—(6k3-2k2+2k)
66
(3m2-2m-9)+(4m-9n-6)
(9x2-x+3)-4(6x2+9x)
-7(x2-8)+8(x2-6)
-(x2y-2xy-5)+5(x2y-9xy-2)
66
(—x2-19x-10y)+(—x2-17x-20y)
77
11
-—(3k3-8k2+8)-—(k3-7k2+8k)
23
(7m2-6m-9)+(7m+7n-3)
(x2-x-8)+8(3x2+3x)
-5(x2-4)-7(x2-6)
-(x2y+8xy-4)-3(x2y-7xy-4)
61
(—x2+18x+12y)+(—x2+13x+19y)
77
11
-—(3k3+7k2-5)-—(4k3+7k2-8k)
23
(4m2+7m-4)+(5m+7n-5)
(3x2-7x+4)-4(x2+x)
-7(x2+5)-9(x2+5)
-(x2y-2xy-6)-9(x2y-7xy+5)
91
(—x2+18x+10y)-(—x2+16x-10y)
88
11
-—(k3+3k2+9)-—(5k3+2k2-5k)
65
(m2-4m+1)+(2m-9n+5)
(4x2-7x+5)-4(6x2-9x)
-8(x2-2)+8(x2+6)
-(x2y-6xy+7)-8(x2y+7xy-8)
33
(—x2-16x-20y)+(—x2+14x-14y)
44
11
-—(6k3+2k2+4)+—(8k3+9k2-9k)
46