人教版七年级数学上册整式的加减法练习题精选31.docx
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人教版七年级数学上册整式的加减法练习题精选31
一、计算。
x2y+6x2y-40c2-12.5c2
11
—a2bc+—cba2-2a2b+0.5a2b
44
11
-—st+—st+4-6x3y2-3.5x3y2
36
ab-7a2b2+5+6ab2+9a2b2+6-8ab
4x3-8x2+y2-9y-x2-6y+5y2
(-2a2b+b3)-(-a2b2+b3)
(-x2y-7xy2)+(x2y+7xy2)
-5m2+[4m2+(5m2+9m)+2(m2+7m)]
7-8(1-a)+(1-a-a2)+3(1-a+a2-a3)
(-5a2b-9ab)-(4a2b-ab)
(6n2-2n-5)+(4n2-2n-7)
(5y2+2y-6)+5(8-2y+8y2)
一、计算。
-5x2y-5x2y-50b2-6.5b2
11
—a2bc+—cba2-5a2b-0.9a2b
43
11
-—xy-—xy-7-4a3b-1.5a3b
54
ab+9a2b2+1-8ab2+5a2b2-4-3ab
6x3-3x2+y2-8y+6x2+4y+y2
(a2b-b3)-(-7a2b2+5b3)
(-x2y-xy2)-(x2y-xy2)
-5z2+[-3z2-(3z2+8z)-3(z2-8z)]
6-6(1-a)+(1-a-a2)-5(1-a+a2-a3)
(-a2b+3ab)-(a2b+7ab)
(8n2+4n-4)-(7n2-3n-3)
(5a2-4a-5)-4(2+2a+2a2)
一、计算。
x2y-5x2y30n2-16.5n2
11
-—a2bc-—cba2-a2b-0.7a2b
23
11
—ab+—ab+5-6x3y2-5.5x3y2
46
6ab-4a2b2-6+9ab2-9a2b2-8-4ab
6x3-6x2+3y2-7y-x2+7y+y2
(a2b+9b3)-(-7a2b2+3b3)
(x2y-xy2)-(7x2y+xy2)
3y2-[3y2-(5y2+7y)-2(y2-7y)]
15+4(1-a)+(1-a-a2)-2(1-a+a2-a3)
(-5a2b-2ab)+(6a2b+ab)
(8a2+4a-8)-(2a2-2a-5)
(2b2+6b+6)-5(5+6b-4b2)
一、计算。
x2y-6x2y80a2-12.5a2
11
-—a2bc+—cba27a2b-0.2a2b
62
11
-—xy+—xy-7-4x3y2+2.5x3y2
36
ab-8a2b2+8+4ab2-4a2b2-7-5ab
9x3+6x2+y2+7y-x2-3y+5y2
(-8a2b-b3)-(a2b2-8b3)
(-2x2y-xy2)-(5x2y+xy2)
4m2+[2m2+(4m2-2m)+5(m2+8m)]
19-9(1-a)+(1-a-a2)-3(1-a+a2-a3)
(4a2b-8ab)+(2a2b+ab)
(2m2+4m+1)+(6m2+5m-6)
(9t2-2t+9)+5(2+2t+5t2)
一、计算。
x2y-8x2y-20z2-4.5z2
11
-—a2bc+—cba2a2b-0.9a2b
43
11
—xy-—xy-2-4ab2+4.5ab2
36
5ab+5a2b2-5-3ab2-3a2b2+1+4ab
3x3-9x2-2y2+y-9x2+y-4y2
(a2b-3b3)-(6a2b2-b3)
(4x2y-xy2)-(7x2y+2xy2)
5a2+[8a2-(6a2+2a)+6(a2-6a)]
20+3(1-a)+(1-a-a2)-5(1-a+a2-a3)
(4a2b+7ab)+(-a2b-7ab)
(2b2+6b+9)-(8b2+5b+8)
(2b2-2b+2)-5(4+6b-2b2)
一、计算。
-3x2y+9x2y80z2-16.5z2
11
—a2bc-—cba2-a2b+0.9a2b
45
11
-—pq+—pq+38x2y2-5.5x2y2
56
ab-7a2b2+3+9ab2+5a2b2-3-9ab
7x3+7x2+y2-y+3x2+y-3y2
(-5a2b+9b3)+(-a2b2-b3)
(x2y+xy2)-(x2y+xy2)
-4t2+[2t2-(3t2-2t)-8(t2-6t)]
3+8(1-a)-(1-a-a2)+2(1-a+a2-a3)
(5a2b-3ab)-(a2b+6ab)
(6t2+3t+5)-(4t2-2t+7)
(2y2+6y+1)-2(8+3y+7y2)
一、计算。
x2y-8x2y60b2+14.5b2
11
—a2bc+—cba2-a2b+0.4a2b
32
11
-—st+—st+8-7x2y2-6.5x2y2
66
5ab+5a2b2-9-6ab2-5a2b2+9+7ab
2x3+6x2-6y2-9y-x2+6y+y2
(-2a2b+b3)+(2a2b2+b3)
(6x2y-xy2)-(5x2y-xy2)
-7s2-[9s2-(7s2-2s)+2(s2-7s)]
3+5(1-a)-(1-a-a2)+3(1-a+a2-a3)
(-7a2b-4ab)+(-3a2b+ab)
(5m2-4m+1)-(3m2-4m+5)
(6x2+3x-1)-5(6-2x+8x2)
一、计算。
-4x2y+6x2y-20c2+17.5c2
11
—a2bc-—cba2a2b-0.6a2b
52
11
-—ab-—ab-27x2y2-9.5x2y2
42
3ab+7a2b2-7+3ab2-6a2b2+4+5ab
3x3-8x2-y2+9y+x2+3y+8y2
(4a2b-3b3)+(2a2b2-9b3)
(-5x2y-6xy2)+(x2y+xy2)
-4a2+[-8a2-(6a2-6a)+6(a2-3a)]
11-7(1-a)+(1-a-a2)-2(1-a+a2-a3)
(a2b-5ab)-(7a2b+ab)
(3c2-6c+1)-(8c2+2c-3)
(5c2+2c-6)-2(9-6c+3c2)
一、计算。
-x2y+2x2y-40c2-19.5c2
11
-—a2bc-—cba2a2b-0.6a2b
22
11
—mn+—mn+10-7ab2+3.5ab2
22
2ab-3a2b2+1+7ab2-7a2b2-3-3ab
8x3+7x2-y2+y+x2-y-y2
(a2b+9b3)+(-a2b2-3b3)
(-x2y+xy2)+(5x2y-xy2)
9s2-[-7s2+(8s2-3s)+6(s2-2s)]
15-6(1-a)-(1-a-a2)+4(1-a+a2-a3)
(7a2b+ab)-(2a2b-9ab)
(4t2+6t-2)+(6t2-5t+1)
(3m2-4m-6)-3(7-4m+4m2)
一、计算。
x2y-6x2y60c2-0.5c2
11
-—a2bc-—cba2-a2b-0.3a2b
32
11
—mn-—mn+2-4x2y2-2.5x2y2
53
8ab-6a2b2-4+8ab2-6a2b2+1-2ab
7x3+5x2+y2-y-x2+7y+y2
(9a2b-b3)-(-4a2b2-b3)
(-x2y-2xy2)+(x2y-xy2)
-9a2+[3a2+(3a2+8a)-8(a2+7a)]
12-4(1-a)+(1-a-a2)+2(1-a+a2-a3)
(a2b+ab)+(8a2b-ab)
(8a2+5a+8)+(5a2-3a+3)
(8a2+5a-8)+3(9+4a+9a2)
一、计算。
-4x2y+3x2y-60n2+7.5n2
11
—a2bc-—cba2-a2b+0.4a2b
66
11
—st+—st-1-7a3b+8.5a3b
22
2ab+3a2b2+3+4ab2+5a2b2-6-6ab
3x3+9x2+y2-y+6x2+4y+8y2
(-a2b-b3)+(-3a2b2-b3)
(9x2y-9xy2)+(7x2y-7xy2)
-7a2+[-8a2-(9a2+9a)-6(a2+6a)]
13-5(1-a)+(1-a-a2)+2(1-a+a2-a3)
(a2b-2ab)+(-a2b-ab)
(2x2+2x-1)-(3x2+4x-8)
(9x2+2x+3)+5(8+4x+3x2)
一、计算。
x2y-4x2y50a2+13.5a2
11
—a2bc-—cba2a2b-0.2a2b
25
11
-—mn-—mn-4-5a2b2-3.5a2b2
56
ab-4a2b2+9-8ab2-8a2b2-1-6ab
4x3+4x2-8y2+2y-5x2-y-5y2
(-6a2b-b3)-(a2b2+b3)
(x2y-7xy2)+(6x2y-xy2)
6n2+[2n2+(3n2-9n)+3(n2+5n)]
8-7(1-a)+(1-a-a2)+3(1-a+a2-a3)
(-a2b+ab)-(-6a2b+ab)
(6z2+3z-1)-(9z2+6z-9)
(6y2-5y+1)+3(6-4y-4y2)
一、计算。
-x2y+5x2y90s2+19.5s2
11
-—a2bc+—cba2-a2b+0.6a2b
52
11
—st-—st+55a3b+8.5a3b
64
5ab-9a2b2-1-9ab2-7a2b2-8-8ab
9x3-6x2-y2-3y+5x2+y+6y2
(-a2b-2b3)-(a2b2-4b3)
(-x2y+xy2)+(5x2y-xy2)
8z2-[-6z2-(5z2+7z)+7(z2-4z)]
3+5(1-a)-(1-a-a2)+5(1-a+a2-a3)
(6a2b+ab)+(a2b-8ab)
(4y2-4y-5)+(7y2-3y+8)
(3a2+5a-7)+3(7-3a-5a2)
一、计算。
4x2y-7x2y-50t2+16.5t2
11
-—a2bc-—cba2-2a2b+0.2a2b
33
11
—xy+—xy+15ab2-7.5ab2