人教版七年级数学上册整式的加减法专项练习题精选17.docx
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人教版七年级数学上册整式的加减法专项练习题精选17
一、计算。
-x2y+9x2y30x2+10.5x2
11
-—a2bc+—cba2-2a2b+0.5a2b
35
11
-—xy+—xy-9-9a2b2-3.5a2b2
34
ab-7a2b2-2-9ab2-7a2b2-3+9ab
5x3-4x2-y2+y+6x2-8y+4y2
(-a2b+5b3)-(8a2b2-b3)
(-8x2y+9xy2)+(x2y-5xy2)
-3a2-[-2a2-(6a2-5a)-2(a2+9a)]
10+7(1-a)+(1-a-a2)+5(1-a+a2-a3)
(7a2b-8ab)-(-6a2b+ab)
(3m2-2m-7)+(5m2-6m-9)
(3y2+4y-5)+2(7+4y+3y2)
一、计算。
4x2y-6x2y-30b2+5.5b2
11
-—a2bc-—cba28a2b+0.6a2b
54
11
—xy+—xy-42x2y2+2.5x2y2
65
2ab-6a2b2+7+6ab2+5a2b2-6+5ab
3x3-2x2-y2+7y+x2-2y+6y2
(6a2b-7b3)+(-a2b2+9b3)
(x2y+xy2)-(x2y+2xy2)
-6a2+[-4a2+(2a2-6a)+5(a2-6a)]
16+2(1-a)-(1-a-a2)+5(1-a+a2-a3)
(8a2b-5ab)+(-a2b-2ab)
(7t2-2t-8)+(2t2-6t-5)
(8s2+3s-6)-5(4+2s+6s2)
一、计算。
x2y+6x2y80s2-10.5s2
11
-—a2bc-—cba2-6a2b-0.2a2b
55
11
—st+—st+1-10ab2-0.5ab2
46
3ab+3a2b2-2-3ab2-9a2b2-8-2ab
3x3-8x2-y2-y+9x2+8y+y2
(-6a2b+b3)+(-4a2b2-b3)
(5x2y-xy2)-(x2y-2xy2)
-9b2+[2b2-(8b2+9b)-7(b2-5b)]
7-5(1-a)-(1-a-a2)+2(1-a+a2-a3)
(-a2b+ab)-(a2b-ab)
(6c2-2c-8)-(2c2-6c+2)
(8c2-6c+4)-2(6-2c+8c2)
一、计算。
-3x2y-2x2y10a2-2.5a2
11
-—a2bc-—cba2-3a2b+0.7a2b
54
11
-—ab-—ab-10-3ab2+3.5ab2
45
5ab-2a2b2-4+6ab2+9a2b2+9+4ab
2x3+3x2-y2+6y+x2+y-6y2
(-a2b+7b3)+(a2b2-7b3)
(-6x2y-xy2)-(8x2y-9xy2)
-7s2-[3s2+(8s2+8s)+7(s2+2s)]
14-8(1-a)-(1-a-a2)-3(1-a+a2-a3)
(-6a2b+8ab)-(a2b-ab)
(4x2-2x+1)+(7x2-5x+3)
(3y2+5y+9)-4(4-4y-2y2)
一、计算。
7x2y-3x2y30b2-17.5b2
11
-—a2bc-—cba2-2a2b+0.4a2b
53
11
—st+—st-25x2y+1.5x2y
46
8ab-3a2b2-4-8ab2-3a2b2-8-6ab
9x3-7x2-6y2+y+7x2-y+y2
(-a2b-b3)-(4a2b2+b3)
(-x2y-xy2)-(6x2y-xy2)
3b2+[7b2+(5b2-6b)-3(b2-7b)]
8+8(1-a)+(1-a-a2)-5(1-a+a2-a3)
(9a2b-ab)+(-5a2b-3ab)
(7m2-6m-6)+(3m2+2m-6)
(3t2+5t-8)+3(3-4t-5t2)
一、计算。
-5x2y+7x2y-90x2-9.5x2
11
—a2bc-—cba25a2b+0.4a2b
52
11
-—mn-—mn+10-3x3y2+0.5x3y2
23
5ab-4a2b2-3-7ab2+2a2b2-7+9ab
7x3-2x2+2y2+y-x2+y+6y2
(-3a2b+7b3)+(9a2b2+5b3)
(-x2y+6xy2)-(2x2y+xy2)
3y2-[7y2-(3y2-2y)-3(y2+7y)]
4-3(1-a)-(1-a-a2)-5(1-a+a2-a3)
(-4a2b-ab)+(a2b+ab)
(9n2-4n-3)+(6n2-4n+1)
(7c2-4c+7)+2(3+4c-3c2)
一、计算。
x2y+2x2y90a2+10.5a2
11
-—a2bc+—cba2-9a2b+0.9a2b
63
11
-—xy+—xy+10-7a3b-0.5a3b
44
ab+3a2b2+9+6ab2+5a2b2+6+7ab
8x3-4x2+y2+3y-9x2+9y-y2
(a2b-4b3)-(-5a2b2+8b3)
(-x2y+xy2)+(3x2y+xy2)
9n2-[-9n2-(2n2-6n)+9(n2-2n)]
2+5(1-a)+(1-a-a2)+5(1-a+a2-a3)
(7a2b+4ab)+(-a2b-ab)
(9c2-2c-7)+(4c2-4c+1)
(3z2-4z+5)-3(7+4z+6z2)
一、计算。
x2y-4x2y-40a2-17.5a2
11
-—a2bc-—cba2a2b-0.8a2b
23
11
-—st-—st+75x2y+1.5x2y
62
8ab+4a2b2-6-7ab2+3a2b2+3+7ab
5x3-4x2-2y2+2y-x2-y+y2
(-a2b-3b3)+(-a2b2-b3)
(-5x2y+xy2)-(x2y+xy2)
-7n2+[-4n2+(5n2+6n)+3(n2+3n)]
9-9(1-a)+(1-a-a2)+3(1-a+a2-a3)
(-8a2b-9ab)+(-a2b-7ab)
(5m2-3m-1)-(5m2+5m+7)
(4s2+3s+8)-3(3+3s-9s2)
一、计算。
-x2y-8x2y-100m2-5.5m2
11
—a2bc+—cba27a2b-0.7a2b
62
11
-—st+—st-7-4ab2-7.5ab2
32
6ab-7a2b2-3+2ab2+8a2b2+8-7ab
4x3-2x2+y2+y+x2-6y-7y2
(a2b-9b3)-(-6a2b2-b3)
(-x2y+xy2)-(x2y+7xy2)
8m2-[9m2-(6m2-7m)-2(m2+3m)]
6+7(1-a)-(1-a-a2)-5(1-a+a2-a3)
(-a2b+5ab)-(a2b+4ab)
(5b2-3b-2)+(9b2-5b-5)
(7y2+5y-9)-5(3+2y+6y2)
一、计算。
-8x2y+4x2y-50n2-19.5n2
11
—a2bc+—cba2a2b-0.8a2b
64
11
-—pq-—pq-107x2y-0.5x2y
45
ab-6a2b2+2-4ab2+2a2b2+8+4ab
3x3+5x2-6y2+y+x2-y+4y2
(9a2b-b3)-(a2b2+5b3)
(-x2y+2xy2)-(8x2y+2xy2)
4a2-[-4a2+(3a2-6a)-3(a2-8a)]
9+6(1-a)-(1-a-a2)+4(1-a+a2-a3)
(8a2b-ab)-(-a2b-9ab)
(5n2+6n+8)+(4n2-4n-5)
(8c2-3c+9)+4(8-3c+6c2)
一、计算。
8x2y-4x2y70t2+7.5t2
11
—a2bc+—cba2-5a2b-0.2a2b
25
11
-—pq-—pq+22ab2+9.5ab2
63
ab-6a2b2+5+8ab2+7a2b2-5+2ab
9x3-5x2-y2+9y+x2+4y-y2
(-4a2b-b3)-(-a2b2-b3)
(-2x2y-2xy2)-(5x2y+3xy2)
-3y2-[6y2-(8y2-5y)+5(y2+7y)]
6+3(1-a)-(1-a-a2)+2(1-a+a2-a3)
(2a2b+3ab)+(-5a2b+3ab)
(4z2+3z+5)+(2z2-4z+1)
(5a2+4a-9)+5(7+2a-2a2)
一、计算。
-x2y+5x2y60m2-6.5m2
11
-—a2bc+—cba2-a2b-0.9a2b
63
11
—mn-—mn+7-2x3y2-8.5x3y2
26
ab+5a2b2+5-7ab2+5a2b2-6+2ab
8x3-7x2-2y2+4y-8x2-7y-y2
(8a2b-b3)-(-a2b2-6b3)
(-8x2y+xy2)+(4x2y+2xy2)
2s2+[5s2-(7s2+6s)-5(s2-6s)]
12-8(1-a)-(1-a-a2)+2(1-a+a2-a3)
(-a2b+ab)+(6a2b+5ab)
(7a2-5a-3)+(3a2-4a+5)
(8t2-2t+3)+3(2-3t+9t2)
一、计算。
x2y+5x2y-80s2-18.5s2
11
—a2bc-—cba2-a2b+0.4a2b
32
11
-—mn+—mn+65a2b2+3.5a2b2
32
7ab+9a2b2+4+2ab2-9a2b2-2+3ab
2x3-8x2-y2-y-6x2-3y-y2
(5a2b+8b3)+(-6a2b2-b3)
(x2y+xy2)-(2x2y+xy2)
-9n2+[-2n2-(4n2+2n)+3(n2-4n)]
16-4(1-a)-(1-a-a2)+3(1-a+a2-a3)
(3a2b+ab)+(6a2b+6ab)
(3t2-3t-8)-(3t2-2t+8)
(8n2-6n+9)+4(5-3n+7n2)
一、计算。
x2y+3x2y-70x2-0.5x2
11
—a2bc+—cba2-2a2b-0.9a2b
62
11
-—xy+—xy-8