人教版七年级数学上册整式的加减法专项练习题精选14.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14
一、计算。
x2y+2x2y-40y2-12.5y2
11
-—a2bc-—cba28a2b-0.5a2b
52
11
-—xy+—xy-9-8x2y2+9.5x2y2
45
9ab-4a2b2+2+9ab2+5a2b2+2-4ab
8x3-3x2-4y2-y+x2-y+2y2
(-a2b-9b3)-(5a2b2+8b3)
(8x2y+xy2)-(x2y-xy2)
9b2+[-3b2+(6b2+6b)-9(b2-5b)]
11+8(1-a)+(1-a-a2)-5(1-a+a2-a3)
(5a2b-ab)+(-7a2b-3ab)
(5m2-2m-1)+(5m2+4m-7)
(6y2+2y+9)-4(7-2y-9y2)
一、计算。
2x2y+8x2y90t2+8.5t2
11
-—a2bc-—cba2-a2b-0.6a2b
36
11
—st+—st+55a3b+7.5a3b
46
8ab+7a2b2-9+8ab2+3a2b2-1-7ab
3x3-6x2-y2-2y-8x2-2y-y2
(4a2b-b3)-(9a2b2+b3)
(2x2y-2xy2)-(x2y-xy2)
-8t2+[9t2-(4t2+4t)+6(t2-8t)]
5+5(1-a)-(1-a-a2)-3(1-a+a2-a3)
(7a2b-8ab)+(-a2b+7ab)
(3z2-5z-6)-(4z2-5z-2)
(3y2-2y-5)+5(3-6y+9y2)
一、计算。
-2x2y-2x2y80t2+0.5t2
11
-—a2bc-—cba2a2b+0.7a2b
22
11
—pq-—pq-27x2y2+9.5x2y2
34
9ab+6a2b2+5+3ab2-3a2b2-7+6ab
2x3-6x2-y2-y-x2-y+9y2
(-6a2b+9b3)+(-a2b2-7b3)
(-x2y+8xy2)+(x2y-xy2)
-5c2+[3c2+(9c2+4c)-7(c2+4c)]
16-6(1-a)-(1-a-a2)-3(1-a+a2-a3)
(-a2b+7ab)+(-5a2b-7ab)
(5b2-2b-1)-(6b2-2b-4)
(7c2-4c-4)+3(9-4c-4c2)
一、计算。
6x2y-9x2y-50m2-7.5m2
11
-—a2bc+—cba2-a2b-0.5a2b
52
11
—mn+—mn-46ab2+7.5ab2
26
3ab+2a2b2-3-7ab2-3a2b2+9-2ab
7x3+3x2+y2+y+x2+2y-3y2
(3a2b+b3)-(-a2b2-6b3)
(x2y-xy2)+(9x2y-9xy2)
-6b2-[-4b2-(5b2+7b)-9(b2-3b)]
4-5(1-a)-(1-a-a2)+4(1-a+a2-a3)
(-6a2b-6ab)+(a2b+ab)
(8t2-4t+1)+(2t2+6t+2)
(9b2+3b-4)-5(7-4b-8b2)
一、计算。
x2y-6x2y-100a2+2.5a2
11
—a2bc-—cba29a2b-0.7a2b
44
11
—xy+—xy-9-5x3y2-3.5x3y2
54
ab+8a2b2-3-2ab2-2a2b2-6-6ab
8x3-6x2+y2-y-6x2+y+y2
(2a2b-b3)-(a2b2-9b3)
(4x2y-9xy2)+(x2y+6xy2)
-6c2-[5c2-(9c2+6c)+9(c2+5c)]
10+7(1-a)-(1-a-a2)+4(1-a+a2-a3)
(2a2b-ab)-(2a2b+ab)
(5t2-6t-4)+(3t2-3t-1)
(7c2-4c+9)-4(5-6c+4c2)
一、计算。
x2y+6x2y50s2-3.5s2
11
-—a2bc+—cba2a2b-0.2a2b
26
11
-—st+—st+1010x2y2-7.5x2y2
24
8ab-5a2b2+3-9ab2+5a2b2-2-3ab
8x3-5x2+9y2+y+x2-y+y2
(3a2b-b3)-(a2b2-b3)
(3x2y-3xy2)+(8x2y-2xy2)
9y2-[-8y2-(3y2+6y)+7(y2+8y)]
9-5(1-a)+(1-a-a2)+5(1-a+a2-a3)
(-3a2b+ab)-(-a2b+6ab)
(2m2-6m+5)-(9m2-3m-9)
(6m2-5m-7)+3(6+4m-4m2)
一、计算。
x2y+5x2y-70t2-15.5t2
11
-—a2bc+—cba2a2b+0.7a2b
24
11
—pq-—pq-104ab2+7.5ab2
36
ab+2a2b2+4-3ab2+3a2b2-2+7ab
4x3+9x2-y2-y+6x2+y-6y2
(a2b-3b3)+(-a2b2-7b3)
(-9x2y-xy2)-(x2y-xy2)
-6s2-[6s2-(6s2+2s)-2(s2-8s)]
8-6(1-a)-(1-a-a2)+3(1-a+a2-a3)
(a2b+8ab)-(-5a2b+ab)
(6m2+2m+2)-(8m2-2m+1)
(8a2+6a-7)-4(7-4a+4a2)
一、计算。
-9x2y-8x2y40y2-19.5y2
11
-—a2bc-—cba2-8a2b-0.9a2b
66
11
-—pq-—pq+18a2b2-2.5a2b2
62
ab-9a2b2-1-4ab2+5a2b2-5-7ab
7x3-3x2+y2-9y+3x2-y-2y2
(a2b+9b3)+(4a2b2+7b3)
(-2x2y-xy2)+(x2y+8xy2)
5x2+[2x2-(5x2-8x)+7(x2-5x)]
16+8(1-a)-(1-a-a2)-2(1-a+a2-a3)
(2a2b-2ab)-(a2b-2ab)
(4b2+6b+7)+(2b2-2b-7)
(6y2+4y-9)-5(5+6y-8y2)
一、计算。
-x2y+6x2y100b2-7.5b2
11
-—a2bc-—cba28a2b+0.5a2b
23
11
—pq-—pq+2-7x2y2-2.5x2y2
54
ab-7a2b2-5+4ab2+8a2b2-7-7ab
4x3+7x2+y2-y+3x2-y-y2
(-a2b+b3)+(-7a2b2+2b3)
(-7x2y+3xy2)+(2x2y-6xy2)
-4n2+[7n2+(3n2+6n)-7(n2-2n)]
6+7(1-a)+(1-a-a2)+2(1-a+a2-a3)
(9a2b-ab)+(3a2b-ab)
(6n2+2n-7)+(8n2+4n-9)
(6s2+6s-7)-2(5+6s-7s2)
一、计算。
-6x2y-3x2y30x2-13.5x2
11
—a2bc+—cba2-a2b-0.7a2b
43
11
—mn-—mn-87a3b+6.5a3b
23
4ab-6a2b2-9-7ab2-6a2b2-7+4ab
5x3-6x2+y2+y+3x2+y+9y2
(-9a2b-8b3)-(-2a2b2-b3)
(7x2y-2xy2)+(6x2y-xy2)
5m2-[-9m2-(8m2+8m)-6(m2+7m)]
6+4(1-a)-(1-a-a2)+3(1-a+a2-a3)
(-5a2b-ab)-(-4a2b-6ab)
(6x2-4x-9)-(7x2+6x-5)
(4t2+4t+7)+3(2-2t+5t2)
一、计算。
-x2y-2x2y-10y2-1.5y2
11
-—a2bc-—cba2a2b+0.9a2b
53
11
—xy-—xy+4-3x2y+1.5x2y
34
8ab-5a2b2-7+5ab2+2a2b2-5-6ab
7x3-9x2+y2-4y-9x2+5y-y2
(-a2b-9b3)-(-a2b2-b3)
(x2y+xy2)-(x2y-xy2)
-3c2-[5c2+(8c2+9c)+5(c2+6c)]
4-4(1-a)+(1-a-a2)+3(1-a+a2-a3)
(a2b+9ab)+(8a2b-ab)
(5y2+5y-7)+(5y2+4y-4)
(8c2+4c+4)+2(3+2c+6c2)
一、计算。
-x2y-6x2y40n2-8.5n2
11
-—a2bc+—cba29a2b-0.5a2b
46
11
—pq-—pq-210ab2+6.5ab2
32
ab-4a2b2-2-8ab2+4a2b2+7-2ab
5x3-5x2-5y2-y+9x2+9y+y2
(5a2b+b3)+(2a2b2-b3)
(4x2y+xy2)+(x2y-xy2)
4a2-[-9a2+(7a2-2a)+7(a2-9a)]
17+6(1-a)-(1-a-a2)-3(1-a+a2-a3)
(a2b-8ab)-(7a2b+ab)
(7s2+5s-3)+(7s2-2s-8)
(5s2+2s-6)+4(8+3s-8s2)
一、计算。
-4x2y-5x2y80c2+11.5c2
11
—a2bc+—cba27a2b-0.9a2b
42
11
—pq-—pq-7-7a3b-4.5a3b
66
ab+7a2b2-5+7ab2-9a2b2+6+6ab
2x3+6x2-8y2-y-4x2-3y+3y2
(a2b-b3)-(-2a2b2+b3)
(-x2y-3xy2)+(6x2y+4xy2)
8m2+[-7m2+(5m2+8m)-4(m2+2m)]
8-6(1-a)+(1-a-a2)-2(1-a+a2-a3)
(-2a2b-ab)+(-a2b-ab)
(4t2-3t-9)-(7t2-3t+7)
(7x2-5x+8)+4(6-4x-6x2)
一、计算。
-2x2y+5x2y30m2+13.5m2
11
-—a2bc+—cba2-a2b+0.5a2b
25
11
-—pq-—pq-27ab2+4.5ab2
23