七年级数学下册整式的加减法练习题精选强烈推荐 220.docx
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七年级数学下册整式的加减法练习题精选强烈推荐220
x2-(2x2-x-5)+(6x+9)
3y2+(6x2+y)-(2x2-9y2)
1
(7x2-xy-—x)-(9x2-4xy+2x)
3
61
(—xy+9y2+3)+(x2-—xy+4y2-4)
56
61
(xy+—y+—)+(xy+x+1)
76
(8y-7x-4z2)+(8y-5x-z2)
(8m2-m+2)+(8m+6n-6)
(6x2-2x+9)+8(8x2-9x)
-9(x2-8)+4(x2+7)
-(x2y-8xy+2)-4(x2y-7xy+2)
11
(—x2+30x+15y)+(—x2+15x-15y)
44
11
-—(2k3-5k2+5)+—(4k3-9k2+5k)
26
(k2-7k)+(2k2+k+4)
(7a2+a-b)-(2a2-a+2b)
6x2-(8x2-8x-9)+(6x+4)
2y2+(8x2+y)+(7x2-4y2)
1
(8x2-7xy+—x)+(x2+3xy+3x)
5
41
(—xy+4y2+3)+(x2-—xy-3y2-8)
57
45
(xy-—y+—)+(xy-x-7)
36
(9y-7x-8z2)+(4y+x+2z2)
(2m2+9m+8)+(m+9n-5)
(3x2+7x-9)+9(9x2-8x)
-9(x2+2)+5(x2-9)
-(x2y+5xy-5)+2(x2y+9xy-8)
12
(—x2+19x-17y)-(—x2+14x+26y)
33
11
-—(6k3-6k2+9)+—(k3-8k2-5k)
63
(6k2+6k)-(7k2-7k-4)
(a2-5a-7b)-(9a2-4a-4b)
x2+(2x2-6x+8)+(4x-1)
6y2-(4x2-y)-(8x2-8y2)
4
(6x2+8xy-—x)+(5x2-3xy+7x)
5
31
(—xy-4y2-2)-(x2+—xy-3y2-3)
47
29
(xy-—y+—)-(xy-x+4)
38
(8y+6x-4z2)+(2y-x-9z2)
(8m2+8m+2)-(4m+5n+5)
(x2+3x+5)+3(2x2-4x)
-5(x2-6)+5(x2+1)
-(x2y+8xy+7)+9(x2y-3xy-4)
51
(—x2+13x-10y)-(—x2-10x-20y)
44
11
-—(9k3+4k2+9)-—(4k3-7k2-6k)
66
(4k2-8k)-(k2-3k+6)
(4a2-a-b)+(8a2+8a+6b)
5x2+(5x2+x+3)-(3x-5)
8y2-(2x2-y)+(7x2-8y2)
1
(7x2-6xy+—x)+(3x2-8xy-6x)
5