人教版七年级数学上册整式的加减法专项练习题精选28.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28
一、计算。
6x2y-5x2y40z2-13.5z2
11
-—a2bc+—cba2-a2b+0.6a2b
62
11
-—ab+—ab+2-10x3y2+9.5x3y2
52
ab-6a2b2-7+4ab2+8a2b2-3-5ab
7x3-6x2+7y2-5y-3x2+5y+y2
(-a2b+b3)+(a2b2+2b3)
(-x2y-xy2)-(5x2y+xy2)
-5m2+[-7m2+(9m2+2m)+8(m2+8m)]
11-7(1-a)-(1-a-a2)+3(1-a+a2-a3)
(9a2b-5ab)-(a2b-6ab)
(7x2+4x+6)-(5x2-2x-1)
(4c2+4c-9)-4(6+4c-5c2)
一、计算。
-6x2y-7x2y20m2-10.5m2
11
-—a2bc+—cba2a2b-0.2a2b
63
11
-—ab-—ab-8-3x3y2-7.5x3y2
56
6ab-5a2b2+4-7ab2-2a2b2-1+7ab
2x3-4x2+7y2-2y+x2-7y+7y2
(4a2b+6b3)+(-a2b2-4b3)
(-x2y+8xy2)+(8x2y-xy2)
-8z2-[3z2+(6z2+2z)+4(z2+4z)]
8+9(1-a)+(1-a-a2)-5(1-a+a2-a3)
(a2b-3ab)+(-a2b+8ab)
(9a2-4a+2)+(2a2-4a-2)
(8m2+6m+6)-3(2+4m+8m2)
一、计算。
-x2y+9x2y-20c2+9.5c2
11
-—a2bc-—cba2-3a2b+0.6a2b
64
11
—mn-—mn-102a3b-2.5a3b
53
3ab-5a2b2-8-5ab2+2a2b2-2+3ab
7x3+6x2-y2+y-7x2+y-5y2
(7a2b-b3)+(a2b2-b3)
(-x2y+xy2)-(7x2y-4xy2)
-9s2-[-9s2-(8s2-6s)-8(s2-4s)]
19-4(1-a)+(1-a-a2)+5(1-a+a2-a3)
(-2a2b-8ab)+(-2a2b+ab)
(6n2+3n+5)-(8n2+3n+9)
(7x2+6x-6)-3(6+2x+6x2)
一、计算。
x2y-5x2y-90a2-0.5a2
11
—a2bc+—cba2a2b+0.6a2b
34
11
-—xy+—xy-58x2y2+2.5x2y2
33
ab+9a2b2+9+6ab2+7a2b2+1+7ab
9x3-9x2+y2+y+x2+7y+y2
(-a2b-b3)-(2a2b2+7b3)
(x2y+xy2)-(x2y-5xy2)
4n2-[-3n2-(9n2+7n)+4(n2-4n)]
8+5(1-a)+(1-a-a2)-4(1-a+a2-a3)
(-a2b+ab)+(-4a2b+ab)
(4y2+6y+8)-(6y2-4y-2)
(2y2+5y+5)+4(8+3y-8y2)
一、计算。
3x2y+8x2y-10x2-13.5x2
11
—a2bc-—cba2a2b+0.9a2b
55
11
—mn+—mn-24ab2-6.5ab2
52
ab+8a2b2+7+3ab2-7a2b2-3+9ab
5x3-5x2-y2+3y-x2-9y+4y2
(-2a2b-b3)+(-a2b2+6b3)
(7x2y-7xy2)-(x2y+xy2)
-3s2+[-6s2-(4s2-5s)-9(s2-6s)]
4+5(1-a)+(1-a-a2)-5(1-a+a2-a3)
(a2b+6ab)-(8a2b-6ab)
(8a2-6a+3)-(3a2-2a-7)
(9c2-4c+1)+3(5-3c-4c2)
一、计算。
x2y-7x2y70y2+16.5y2
11
-—a2bc+—cba24a2b+0.9a2b
52
11
-—st-—st-8-9a2b2-2.5a2b2
23
ab+3a2b2-4+6ab2+8a2b2-7-5ab
8x3+6x2-y2-4y-x2+y+2y2
(8a2b+7b3)+(9a2b2+9b3)
(6x2y+5xy2)+(9x2y-6xy2)
-8b2+[2b2-(8b2-5b)+4(b2-5b)]
12-6(1-a)-(1-a-a2)-2(1-a+a2-a3)
(a2b-8ab)-(-a2b+9ab)
(4b2-3b+7)+(5b2+5b-4)
(5n2+3n-6)+3(6+3n+4n2)
一、计算。
x2y+6x2y10y2+15.5y2
11
—a2bc+—cba2-2a2b+0.5a2b
63
11
-—pq+—pq-24ab2-6.5ab2
45
7ab+3a2b2-5+2ab2+7a2b2-2-8ab
5x3-7x2-3y2-y-3x2-9y-8y2
(7a2b-b3)-(7a2b2-b3)
(-7x2y-xy2)+(x2y-5xy2)
7b2+[6b2-(9b2+5b)-4(b2-9b)]
13+6(1-a)-(1-a-a2)-2(1-a+a2-a3)
(-7a2b-ab)+(9a2b+ab)
(5a2+3a+3)-(4a2-6a+9)
(3t2-2t+5)-3(8+3t+6t2)
一、计算。
-5x2y-7x2y80b2+16.5b2
11
-—a2bc-—cba2-8a2b-0.9a2b
33
11
—st+—st-35a3b+8.5a3b
63
7ab-7a2b2-1-6ab2-5a2b2+5+7ab
6x3-8x2-y2-y+7x2+7y+y2
(-3a2b-b3)+(6a2b2-b3)
(-5x2y-xy2)-(x2y+6xy2)
-6t2-[8t2-(4t2+3t)+3(t2-6t)]
3+9(1-a)+(1-a-a2)+2(1-a+a2-a3)
(-a2b+6ab)-(a2b+9ab)
(5a2-3a-8)-(3a2+4a+9)
(9c2-4c+8)+2(3+2c+7c2)
一、计算。
9x2y-5x2y40m2-6.5m2
11
-—a2bc+—cba2-a2b+0.5a2b
32
11
-—mn+—mn-5-9ab2-7.5ab2
33
ab+9a2b2-9+7ab2-4a2b2-5-7ab
7x3+3x2+y2-y-x2-6y+5y2
(a2b+b3)+(-2a2b2+3b3)
(3x2y+xy2)-(6x2y-xy2)
-7n2-[-5n2-(7n2+2n)-3(n2+3n)]
9-3(1-a)+(1-a-a2)+3(1-a+a2-a3)
(6a2b-ab)-(9a2b+6ab)
(8t2+3t+9)-(8t2+2t-3)
(4s2-4s+2)+2(6+2s+8s2)
一、计算。
-2x2y-8x2y20b2+10.5b2
11
-—a2bc-—cba2-a2b+0.3a2b
53
11
-—st+—st+6-8x2y2-4.5x2y2
43
ab-3a2b2+9-4ab2-9a2b2-7+5ab
9x3-3x2-8y2+y+x2+y-y2
(8a2b+2b3)-(a2b2+9b3)
(x2y-xy2)+(x2y+xy2)
-3y2-[-7y2-(9y2-2y)+3(y2+4y)]
3-8(1-a)+(1-a-a2)+5(1-a+a2-a3)
(a2b-ab)+(4a2b-ab)
(8t2-5t+5)-(2t2-3t+6)
(9y2+4y+3)-3(8+2y-8y2)
一、计算。
-x2y+5x2y90m2-4.5m2
11
—a2bc-—cba2a2b+0.3a2b
36
11
-—pq+—pq-86a3b-8.5a3b
53
ab-2a2b2-6-9ab2-7a2b2+4+4ab
3x3-2x2-5y2-8y-x2-8y+9y2
(a2b-b3)-(a2b2-9b3)
(x2y+xy2)-(x2y-8xy2)
7s2-[-3s2-(4s2+8s)-4(s2+7s)]
14-8(1-a)-(1-a-a2)-3(1-a+a2-a3)
(5a2b-5ab)-(a2b+ab)
(9y2-5y-9)-(3y2+6y+5)
(2y2+6y-2)+2(4+3y-5y2)
一、计算。
-x2y-3x2y-90z2-10.5z2
11
—a2bc-—cba28a2b-0.9a2b
63
11
-—ab+—ab+9-3x2y-8.5x2y
64
5ab-7a2b2+2+6ab2+9a2b2+1-6ab
2x3-5x2+y2-y+8x2-5y-y2
(6a2b+b3)+(-3a2b2-b3)
(-8x2y+xy2)-(x2y+xy2)
-3t2+[9t2+(4t2-9t)-4(t2-7t)]
7+7(1-a)+(1-a-a2)+2(1-a+a2-a3)
(-a2b+6ab)-(8a2b-4ab)
(9a2+2a+1)+(7a2+2a+7)
(5t2+3t+7)-3(6+5t-3t2)
一、计算。
2x2y-9x2y-20n2+19.5n2
11
-—a2bc-—cba2-a2b-0.6a2b
46
11
—ab+—ab-5-8x2y2+5.5x2y2
66
ab-4a2b2-3-2ab2-6a2b2+1-7ab
9x3-4x2-y2-y-x2-y+6y2
(-7a2b-b3)-(-7a2b2+b3)
(-6x2y+xy2)+(9x2y+9xy2)
4z2+[-8z2+(2z2-8z)+3(z2-7z)]
10+2(1-a)+(1-a-a2)+3(1-a+a2-a3)
(9a2b-ab)+(a2b+2ab)
(4b2+6b+1)-(7b2-2b+9)
(5n2+4n+6)+5(9-4n-4n2)
一、计算。
-9x2y+7x2y50b2-10.5b2
11
-—a2bc+—cba2a2b-0.7a2b
22
11
-—xy-—xy-3-9ab2-7.5ab2
6