七年级数学下册整式的加减法计算题 256.docx
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七年级数学下册整式的加减法计算题256
(9m2-2m+3)-(9m+2n-3)
(x2-8x+6)+2(7x2-x)
-7(x2-3)+2(x2+9)
-(x2y-4xy-6)+7(x2y+4xy-2)
41
(—x2-25x+14y)-(—x2-16x+27y)
33
11
-—(7k3+3k2-1)-—(5k3+8k2-3k)
25
(m2+3m+7)-(4m-9n-2)
(9x2-8x+5)+9(6x2+x)
-6(x2+3)+6(x2+9)
-(x2y-7xy-9)+4(x2y-2xy+7)
22
(—x2-17x-18y)+(—x2+20x-27y)
33
11
-—(3k3+7k2-8)+—(7k3-9k2-4k)
23
(m2+4m+5)-(2m-7n-5)
(9x2-4x-3)+8(8x2+9x)
-2(x2-7)+6(x2+3)
-(x2y+5xy-4)-2(x2y+9xy-7)
99
(—x2+30x+19y)+(—x2+14x+14y)
88
11
-—(6k3+6k2+5)+—(7k3+7k2+4k)
42
(4m2+8m+6)+(3m+7n-4)
(5x2+6x+6)-6(5x2-3x)
-7(x2+8)-4(x2-4)
-(x2y+2xy-2)-7(x2y-6xy+8)
16
(—x2-26x+14y)-(—x2-19x+22y)
55
11
-—(k3-5k2+5)+—(4k3-k2+9k)
44
(7m2+2m-7)+(m+5n-9)
(8x2-9x+7)-7(5x2+4x)
-5(x2-5)-7(x2+2)
-(x2y+7xy+5)-4(x2y-7xy+9)
41
(—x2-30x+17y)-(—x2+20x+10y)
55
11
-—(4k3-2k2-7)+—(4k3-6k2-9k)
23
(8m2+6m-1)+(7m-6n+8)
(8x2-2x+5)-9(x2-x)
-5(x2+6)-7(x2-5)
-(x2y+2xy-9)+8(x2y+9xy-6)
19
(—x2+17x-18y)-(—x2-15x+28y)
88
11
-—(k3-3k2+7)+—(7k3-8k2-4k)
44
(3m2-2m-6)+(8m+7n+2)
(3x2+4x-2)+3(7x2+8x)
-8(x2+8)+2(x2-6)
-(x2y-8xy-5)+6(x2y+4xy-2)
79
(—x2+24x+18y)+(—x2+13x-21y)
88
11
-—(8k3-3k2-9)-—(8k3+3k2-5k)
24
(9m2+9m-4)-(6m-3n+3)
(7x2-5x+4)-7(x2-7x)
-7(x2-5)+8(x2-5)