人教版七年级数学上册整式的加减法专项练习题精选45.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45
一、计算。
7x2y+7x2y30y2+15.5y2
11
-—a2bc-—cba2-a2b+0.8a2b
22
11
—pq+—pq-3-2x3y2-7.5x3y2
26
ab-3a2b2+8+3ab2+4a2b2+8-2ab
7x3-4x2+5y2+7y-6x2-y+4y2
(-a2b+2b3)+(-a2b2+7b3)
(-x2y+xy2)-(9x2y-2xy2)
-7n2-[2n2-(7n2+6n)+5(n2+4n)]
13+4(1-a)-(1-a-a2)-5(1-a+a2-a3)
(-8a2b-4ab)-(-a2b-ab)
(8m2+5m-6)-(4m2-3m+4)
(6z2+3z+2)-5(8-4z-5z2)
一、计算。
-x2y+4x2y-50x2+3.5x2
11
—a2bc-—cba2-a2b+0.2a2b
26
11
—xy-—xy+10-3x2y2-2.5x2y2
52
ab+7a2b2-1+6ab2-5a2b2-3+4ab
2x3-8x2+4y2+y-x2+2y-6y2
(a2b-6b3)-(-8a2b2-b3)
(-8x2y-xy2)-(x2y+5xy2)
-2x2+[-2x2-(3x2+8x)+5(x2-2x)]
14-2(1-a)+(1-a-a2)-4(1-a+a2-a3)
(9a2b-ab)-(2a2b-ab)
(2t2-4t-6)+(7t2-6t+6)
(8y2-2y-7)+4(6-2y-7y2)
一、计算。
x2y+4x2y50c2+2.5c2
11
-—a2bc-—cba2-a2b+0.8a2b
22
11
-—xy+—xy+18a3b+1.5a3b
22
ab+4a2b2-4+8ab2+7a2b2+9-7ab
7x3-8x2-7y2+y-x2-6y-y2
(a2b-9b3)+(a2b2+b3)
(8x2y+9xy2)+(5x2y-4xy2)
-9a2-[-6a2-(8a2+8a)+7(a2-9a)]
8+9(1-a)-(1-a-a2)+2(1-a+a2-a3)
(-a2b-5ab)-(7a2b+ab)
(6b2-2b-4)+(5b2-6b+9)
(3b2-6b-3)+2(5+3b-2b2)
一、计算。
-x2y-9x2y20x2-7.5x2
11
-—a2bc+—cba2-5a2b+0.9a2b
34
11
—st+—st+1-4a2b2-2.5a2b2
35
ab+3a2b2+7+8ab2-4a2b2-8+2ab
3x3-8x2-y2+6y-x2+6y+7y2
(7a2b+b3)-(8a2b2+2b3)
(-x2y+xy2)+(x2y+5xy2)
9a2+[3a2+(4a2+9a)-4(a2+9a)]
7+4(1-a)+(1-a-a2)-2(1-a+a2-a3)
(a2b-9ab)-(a2b+ab)
(2m2+5m+7)+(9m2-4m+1)
(6z2+3z+9)+5(5-2z+3z2)
一、计算。
x2y+9x2y-70a2-3.5a2
11
—a2bc+—cba2-4a2b+0.3a2b
66
11
-—xy+—xy+8-2x3y2+4.5x3y2
56
3ab+7a2b2-4-8ab2+7a2b2-9+3ab
7x3+9x2-7y2-y+2x2-5y-y2
(-a2b+8b3)-(-6a2b2+b3)
(-3x2y+xy2)+(x2y-xy2)
-7t2+[6t2+(8t2-6t)-2(t2-9t)]
7-7(1-a)-(1-a-a2)+4(1-a+a2-a3)
(3a2b-5ab)+(-a2b-7ab)
(2z2-4z+5)+(9z2+3z+5)
(2m2+2m+7)+4(4-4m+4m2)
一、计算。
-x2y-3x2y-90c2-17.5c2
11
—a2bc+—cba2-9a2b+0.6a2b
32
11
—xy+—xy-6-3x2y+5.5x2y
42
2ab-8a2b2-8-3ab2-9a2b2+2+3ab
3x3-8x2+6y2+2y-2x2-y-5y2
(a2b-8b3)+(-a2b2-b3)
(4x2y+4xy2)-(x2y-xy2)
7n2-[6n2-(4n2-7n)+8(n2-3n)]
18-9(1-a)+(1-a-a2)-2(1-a+a2-a3)
(-2a2b+2ab)+(-a2b-ab)
(5m2-5m+8)-(8m2-3m-9)
(6b2-4b+3)+5(3-4b-8b2)
一、计算。
x2y-7x2y20c2+7.5c2
11
—a2bc-—cba2-3a2b+0.8a2b
25
11
—mn+—mn+44a3b+5.5a3b
22
9ab-8a2b2-2-7ab2+9a2b2+3-4ab
2x3+6x2-5y2-3y-8x2-6y-6y2
(-9a2b+7b3)+(-a2b2-8b3)
(x2y+9xy2)+(6x2y+4xy2)
3m2+[5m2+(7m2+8m)+4(m2-8m)]
18-8(1-a)-(1-a-a2)+3(1-a+a2-a3)
(a2b-ab)-(7a2b-ab)
(5c2+3c+6)+(4c2-4c+1)
(5a2-3a-7)+3(3+3a+4a2)
一、计算。
-x2y-4x2y-90n2+16.5n2
11
—a2bc+—cba28a2b+0.8a2b
65
11
-—st+—st+95x2y+6.5x2y
23
2ab-3a2b2-5+4ab2-6a2b2-8+5ab
2x3-9x2+y2-7y-8x2+y+y2
(a2b-7b3)-(7a2b2-b3)
(-x2y-7xy2)+(x2y-xy2)
4m2-[9m2+(9m2+2m)-2(m2+8m)]
19+6(1-a)-(1-a-a2)-4(1-a+a2-a3)
(a2b+3ab)+(a2b-9ab)
(9x2+6x+2)+(2x2-2x+9)
(3a2-3a-6)+4(2-5a+8a2)
一、计算。
x2y-2x2y90s2-18.5s2
11
—a2bc+—cba2-4a2b-0.5a2b
22
11
-—xy+—xy+83x2y+1.5x2y
22
8ab-4a2b2+8-4ab2-7a2b2+5+2ab
4x3+2x2-y2+3y+4x2-6y-y2
(-2a2b+b3)-(8a2b2+b3)
(3x2y+xy2)-(9x2y+5xy2)
4m2-[8m2+(6m2+7m)-3(m2-7m)]
15+7(1-a)+(1-a-a2)+4(1-a+a2-a3)
(a2b+8ab)-(-a2b-ab)
(8c2-3c+2)+(2c2-3c-3)
(4n2-2n-9)+2(6-2n-2n2)
一、计算。
8x2y-3x2y-10n2-7.5n2
11
—a2bc+—cba2-2a2b+0.9a2b
25
11
-—pq-—pq-9-3ab2+7.5ab2
63
ab+6a2b2+3+8ab2+8a2b2-2-5ab
7x3+2x2+y2+9y-7x2-4y+6y2
(-6a2b+9b3)+(-a2b2+3b3)
(x2y-6xy2)+(2x2y-xy2)
-6a2-[-3a2-(5a2-7a)-2(a2-6a)]
3-6(1-a)-(1-a-a2)-2(1-a+a2-a3)
(-a2b+5ab)+(a2b-5ab)
(8m2+3m+8)-(2m2-3m+5)
(9b2-2b-5)-3(7-5b-7b2)
一、计算。
-x2y-2x2y-40n2-11.5n2
11
—a2bc-—cba2a2b+0.8a2b
56
11
-—mn+—mn-53x2y-1.5x2y
36
ab-6a2b2+8+2ab2-6a2b2-7-7ab
5x3-5x2-6y2-7y+x2-y+y2
(-5a2b-b3)-(a2b2+9b3)
(7x2y-xy2)+(x2y+8xy2)
6b2+[-8b2-(7b2+5b)+3(b2+7b)]
5-5(1-a)-(1-a-a2)-5(1-a+a2-a3)
(5a2b+9ab)+(-a2b-3ab)
(6n2-6n+7)-(6n2+6n+2)
(6t2-3t-1)-4(9+2t+3t2)
一、计算。
x2y-2x2y-30c2+11.5c2
11
-—a2bc-—cba2a2b+0.6a2b
66
11
-—xy-—xy-3-2a2b2+5.5a2b2
55
8ab+3a2b2-6+5ab2-9a2b2+9+2ab
7x3-5x2+y2-y+4x2-3y+y2
(a2b+b3)+(-a2b2-7b3)
(-9x2y+9xy2)+(2x2y+xy2)
-7c2+[-7c2+(2c2-3c)+4(c2-5c)]
14+8(1-a)+(1-a-a2)+2(1-a+a2-a3)
(a2b+ab)+(a2b-ab)
(2t2+5t-5)+(7t2+5t+5)
(2x2+4x-1)+3(8-6x-7x2)
一、计算。
-9x2y+7x2y100a2+17.5a2
11
-—a2bc+—cba27a2b-0.7a2b
23
11
—st-—st+8-10ab2+0.5ab2
64
8ab+7a2b2-4-3ab2+4a2b2+4+8ab
3x3-6x2+y2-y-8x2+9y+y2
(-9a2b-5b3)+(-2a2b2-b3)
(x2y+6xy2)-(x2y+xy2)
-3c2-[6c2+(9c2+8c)+5(c2+7c)]
7-9(1-a)-(1-a-a2)-4(1-a+a2-a3)
(8a2b-ab)-(a2b-ab)
(3n2+4n-3)+(2n2-2n-6)
(8b2-5b-2)+2(4+5b+4b2)
一、计算。
3x2y-8x2y-70t2-7.5t2
11
-—a2bc+—cba2-a2b+0.6a2b
45
11
—ab+—ab+27x2y-8.5x2