七年级数学下册整式的加减法计算题 423.docx
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七年级数学下册整式的加减法计算题423
-(x2y+7xy-3)+8(x2y-7xy-7)
17
(—x2+20x+12y)+(—x2+10x+23y)
66
11
-—(9k3-3k2-6)+—(5k3+4k2+2k)
25
(4m2-5m-5)+(6m+8n+7)
(6x2+5x-6)+5(8x2-x)
-6(x2-6)-5(x2-4)
-(x2y-2xy+3)-2(x2y-8xy+5)
71
(—x2+18x+20y)-(—x2-19x+29y)
88
11
-—(6k3+4k2+1)-—(4k3-5k2-3k)
64
(4m2-7m-9)+(3m+8n+8)
(5x2+8x+5)-9(9x2-7x)
-5(x2-2)-4(x2+4)
-(x2y+7xy+7)-8(x2y-8xy+7)
41
(—x2-22x-13y)+(—x2+18x-24y)
33
11
-—(4k3-3k2+6)-—(9k3-3k2+1k)
24
(5m2+3m-5)-(7m-4n+4)
(3x2+7x-6)-9(x2+6x)
-3(x2-1)+7(x2-6)
-(x2y+7xy-9)+5(x2y-8xy-6)
11
(—x2-10x+19y)+(—x2+16x+22y)
77
11
-—(4k3-5k2+4)-—(2k3+9k2+8k)
64
(6m2+7m-1)-(8m-7n+2)
(7x2+3x+8)+9(x2-7x)
-5(x2+9)+6(x2-1)
-(x2y+8xy+9)-5(x2y-8xy-3)
88
(—x2-12x+18y)+(—x2+20x+14y)
77
11
-—(8k3-7k2+4)+—(7k3+8k2-4k)
46
(3m2-7m+5)-(8m+9n-1)
(2x2+7x-1)+4(6x2+2x)
-5(x2+6)+3(x2-3)
-(x2y+7xy+4)+3(x2y+8xy+6)
51
(—x2-21x+15y)+(—x2-19x+18y)
66
11
-—(8k3+4k2-8)-—(5k3+k2+4k)
22
(m2-4m-5)+(6m-2n-6)
(7x2+7x+8)+8(8x2-7x)
-6(x2-1)-5(x2-8)
-(x2y-5xy-2)-7(x2y-2xy-3)
11
(—x2-15x-11y)-(—x2+16x+15y)
77
11
-—(5k3+7k2-5)-—(8k3+7k2+2k)
62
(8m2-6m-4)+(8m-2n+4)
(7x2+3x-7)+3(5x2-9x)
-4(x2+7)-5(x2+6)
-(x2y+8xy-8)-7(x2y+6xy-2)
17
(—x2-14x-20y)+(—x2+16x-26y)
66
11
-—(8k3-3k2+7)-—(2k3+2k2-6k)
64