初一数学下册计算题天天练 18.docx
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初一数学下册计算题天天练 18.docx
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初一数学下册计算题天天练18
9x2-(7x2+6x+1)+(9x-1)
8y2+(8x2+y)+(2x2+2y2)
5
(9x2+4xy-—x)+(8x2-8xy-6x)
4
57
(—xy+6y2-1)+(x2-—xy+3y2+6)
66
71
(xy+—y-—)+(xy+x+5)
63
(2y+8x-8z2)-(4y-9x-4z2)
(9m2+9m+3)+(8m+7n-1)
(9x2+7x+6)+3(7x2+8x)
-9(x2-1)+5(x2+4)
-(x2y-6xy+3)-7(x2y+2xy-6)
17
(—x2+12x-17y)+(—x2-16x-28y)
88
11
-—(5k3+6k2-3)-—(4k3+2k2+5k)
64
(8k2+9k)-(9k2-7k-6)
(2a2+6a+9b)-(8a2+3a+4b)
x2-(3x2-5x-1)+(6x+2)
6y2-(9x2+y)-(9x2-4y2)
1
(8x2-8xy+—x)+(4x2+xy-x)
7
91
(—xy+3y2-6)-(x2-—xy-4y2-2)
87
14
(xy+—y-—)-(xy-x+6)
53
(5y-9x+2z2)+(3y-5x-6z2)
(7m2-m+4)+(4m-n+9)
(6x2+x+6)+4(9x2+5x)
-2(x2+9)-2(x2-3)
-(x2y-5xy-6)-7(x2y-5xy-9)
44
(—x2+17x-13y)+(—x2+13x+13y)
55
11
-—(3k3-4k2-6)+—(4k3-7k2+5k)
44
(9k2+8k)-(2k2+4k+2)
(3a2-a-9b)-(5a2+7a+2b)
6x2+(7x2+9x+9)-(2x+2)
2y2+(2x2+y)-(6x2-4y2)
1
(5x2+2xy-—x)+(2x2+3xy-5x)
7
26
(—xy-8y2-6)+(x2-—xy-5y2+8)
37
55
(xy-—y-—)-(xy+x+7)
64
(4y+8x+5z2)+(y-7x-6z2)
(7m2+8m-8)+(3m+7n+6)
(x2-9x-2)-3(9x2+5x)
-3(x2+7)-2(x2-3)
-(x2y-2xy-5)+4(x2y-9xy+7)
64
(—x2-22x+11y)-(—x2+19x+23y)
55
11
-—(5k3-9k2+2)-—(k3-8k2-6k)
26
(7k2+k)+(5k2+9k+2)
(a2+7a-8b)-(6a2+2a-2b)
6x2-(6x2-4x-9)-(x+5)
8y2+(6x2-y)+(8x2-y2)
1
(4x2+2xy+—x)-(6x2+7xy+7x)
5
18
(—xy+4y2+8)+(x2-—xy+4y2-6)
87
51
(xy+—y-—)-(xy-x-5)
45
(7y-6x+2z2)+(7y-8x+8z2)
(6m2+3m-7)+(2m+5n-9)
(5x2-3x+2)-2(8x2-5x)
-2(x2-9)-4(x2-1)
-(x2y-2xy+3)+8(x2y+3xy-8)
64
(—x2+12x+12y)+(—x2-12x+27y)
55
11
-—(k3+3k2+1)+—(4k3-k2-2k)
64
(7k2+2k)-(k2-2k-8)
(7a2+8a+6b)-(a2+7a-8b)
9x2-(6x2+6x+1)+(3x+6)
2y2-(4x2+y)-(6x2-2y2)
5
(8x2+8xy+—x)-(2x2-3xy-7x)
4
66
(—xy+6y2-2)+(x2+—xy-y2-6)
77
15
(xy+—y-—)-(xy-x+4)
64
(4y-2x+5z2)+(2y+7x-z2)
(9m2+7m-9)-(6m-8n+7)
(8x2+6x-6)-3(6x2+8x)
-4(x2+5)+6(x2-3)
-(x2y+4xy+2)-5(x2y-5xy+2)
86
(—x2-26x-17y)+(—x2-20x-25y)
77
11
-—(2k3-7k2-3)+—(6k3-5k2+8k)
65
(5k2-9k)-(7k2-4k+9)
(6a2+9a+5b)+(7a2-6a+7b)
2x2-(7x2+3x-3)-(9x-1)
4y2-(3x2+y)+(6x2+3y2)
2
(9x2+5xy-—x)+(6x2-8xy+9x)
3
43
(—xy-y2+8)-(x2-—xy+5y2+6)
34
92
(xy+—y+—)+(xy+x+5)
83
(6y-7x+8z2)-(6y+x-9z2)
(7m2+8m-4)-(4m+3n-9)
(3x2+5x+6)+6(6x2-6x)
-8(x2+3)+7(x2+8)
-(x2y-8xy-6)+9(x2y+9xy+8)
61
(—x2-11x-15y)+(—x2+12x-21y)
77
11
-—(5k3-2k2-6)+—(6k3-4k2-7k)
64
(k2-3k)+(5k2+8k-6)
(5a2-7a+4b)-(6a2+9a+2b)
4x2-(7x2-x+4)-(2x-6)
4y2-(8x2+y)-(2x2-7y2)
1
(4x2-8xy-—x)+(6x2-9xy+x)
6
44
(—xy-5y2-4)+(x2-—xy+8y2+8)
55
43
(xy-—y-—)-(xy+x-3)
54
(2y+x-6z2)+(3y+3x+9z2)
(4m2-2m+5)-(8m+8n-8)
(x2-2x-3)-3(3x2-7x)
-3(x2+2)-7(x2+5)
-(x2y-5xy+2)-7(x2y-2xy+3)
66
(—x2-29x-16y)-(—x2-17x+28y)
55
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