初一数学下册计算题天天练 28.docx
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初一数学下册计算题天天练28
(k2+8k)+(7k2-4k+7)
(3a2-5a-3b)+(8a2+2a+9b)
x2+(8x2+3x+7)+(2x+2)
6y2+(2x2-y)+(4x2-9y2)
1
(6x2+6xy+—x)-(8x2+3xy-x)
4
78
(—xy+4y2+6)+(x2+—xy-6y2+7)
87
11
(xy-—y+—)-(xy-x-5)
66
(8y+8x+z2)+(4y+x-5z2)
(7m2-6m+9)+(5m+7n+9)
(4x2+3x+6)+8(4x2-6x)
-8(x2+6)-3(x2-2)
-(x2y-5xy+3)+5(x2y-8xy+7)
64
(—x2-20x+12y)-(—x2-17x-12y)
55
11
-—(6k3+4k2+9)+—(2k3-7k2+4k)
23
(9k2+2k)-(6k2+6k+4)
(2a2+8a+2b)+(7a2+6a-9b)
8x2-(6x2+7x+4)+(9x+9)
2y2+(9x2+y)+(6x2-y2)
4
(6x2+6xy+—x)-(6x2+3xy+3x)
5
16
(—xy-3y2+6)+(x2+—xy+7y2-6)
87
66
(xy+—y-—)+(xy-x-3)
57
(4y-7x+2z2)-(4y+9x+5z2)
(6m2-9m-7)-(6m+5n+5)
(8x2-4x+9)+8(8x2+7x)
-8(x2-3)+6(x2-6)
-(x2y+5xy-3)-6(x2y+2xy-2)
68
(—x2-22x+17y)+(—x2-18x+21y)
77
11
-—(7k3-6k2-7)+—(7k3-2k2-1k)
46
(4k2-7k)-(9k2+2k+4)
(7a2-8a+4b)-(6a2+a+9b)
x2+(3x2+7x+4)-(8x+4)
4y2+(4x2+y)-(5x2-4y2)
1
(8x2-xy+—x)-(2x2+8xy+7x)
6
46
(—xy-4y2-6)-(x2+—xy-9y2+7)
37
71
(xy-—y+—)-(xy+x+6)
64
(3y+9x-5z2)+(7y-x-3z2)
(8m2+7m+2)-(4m-8n-5)
(8x2-6x-9)+4(7x2-9x)
-6(x2-6)+5(x2+4)
-(x2y-8xy-4)-4(x2y-4xy+5)
75
(—x2+21x+20y)+(—x2+18x-26y)
66
11
-—(8k3-8k2+5)-—(3k3+8k2+6k)
63
(k2+2k)+(4k2-8k+2)
(4a2-4a-b)-(5a2-a-b)
7x2+(4x2+7x+3)+(x+6)
2y2-(4x2+y)-(4x2+8y2)
1
(3x2+7xy+—x)+(9x2-2xy+8x)
8
11
(—xy+3y2+1)-(x2-—xy-5y2+8)
66
52
(xy+—y+—)+(xy+x+4)
43
(5y+4x-5z2)+(9y+2x+3z2)
(9m2+2m+7)+(8m+8n+3)
(2x2-5x+1)-6(7x2+4x)
-2(x2-2)+2(x2-6)
-(x2y-8xy+7)-5(x2y-9xy+4)
16
(—x2-14x+10y)-(—x2+11x+24y)
77
11
-—(4k3-7k2+4)+—(7k3-6k2-7k)
65
(k2+3k)+(2k2-k+8)
(5a2+6a-3b)-(3a2-5a-6b)
3x2+(x2+2x+8)-(2x+5)
3y2-(6x2+y)+(4x2-4y2)
1
(7x2+6xy-—x)+(9x2+9xy-6x)
4
42
(—xy-9y2-2)-(x2-—xy+8y2-7)
53
71
(xy+—y+—)-(xy-x+1)
65
(4y+5x+3z2)-(7y-5x+9z2)
(7m2+8m-8)+(2m-4n+2)
(8x2+7x-8)-6(5x2-8x)
-6(x2-5)+2(x2-9)
-(x2y-5xy-6)-2(x2y-8xy-7)
15
(—x2-13x+15y)+(—x2+12x+13y)
66
11
-—(4k3-9k2-5)-—(9k3+5k2+5k)
63
(4k2-6k)-(9k2+k+9)
(5a2-7a-3b)+(5a2+5a-8b)
8x2-(7x2-9x-7)-(8x-9)
9y2-(4x2-y)-(x2+6y2)
1
(7x2+xy+—x)+(5x2-8xy+x)
5
68
(—xy-3y2+3)-(x2+—xy-7y2-6)
57
61
(xy-—y-—)-(xy-x+2)
75
(4y+5x-6z2)-(5y+5x+8z2)
(6m2-5m-7)+(2m+5n-7)
(8x2-7x+5)-5(7x2-3x)
-5(x2-5)+7(x2+9)
-(x2y-4xy-6)-9(x2y-7xy+6)
51
(—x2+26x-11y)+(—x2-10x+27y)
44
11
-—(9k3-6k2-9)-—(8k3+8k2-4k)
63
(7k2-5k)-(3k2+7k-5)
(4a2-8a+9b)-(7a2-a+3b)
5x2+(4x2-x+1)+(4x-5)
y2-(5x2+y)-(x2+9y2)
1
(3x2+3xy-—x)-(9x2-8xy-5x)
4
19
(—xy+4y2-4)+(x2+—xy+y2+9)
58
25
(xy+—y-—)+(xy-x+4)
36
(y-2x+2z2)-(5y+x+9z2)
(4m2-5m+5)+(3m+7n+5)
(6x2+8x+8)-7(8x2-9x)
-3(x2+1)-7(x2-2)