人教版七年级数学上册整式的加减法练习题精选14.docx
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人教版七年级数学上册整式的加减法练习题精选14
一、计算。
x2y+3x2y50s2-3.5s2
11
-—a2bc+—cba2-a2b-0.7a2b
56
11
—pq+—pq+3-6a2b2+7.5a2b2
23
ab-3a2b2-9-2ab2-9a2b2-3-9ab
6x3+3x2+8y2+y-9x2+y+y2
(3a2b+6b3)+(2a2b2-9b3)
(9x2y-7xy2)-(x2y-6xy2)
-3s2+[-7s2-(9s2-6s)+8(s2-5s)]
7-6(1-a)+(1-a-a2)-5(1-a+a2-a3)
(-a2b+5ab)+(-3a2b+ab)
(7b2+3b-2)+(2b2+4b-7)
(7c2-3c+7)-4(4-4c+4c2)
一、计算。
5x2y-5x2y50b2+8.5b2
11
-—a2bc+—cba2a2b-0.8a2b
22
11
—mn-—mn-2-4x2y-2.5x2y
23
ab-8a2b2+3+2ab2+5a2b2+4-6ab
8x3+9x2+y2-y-x2-y-9y2
(a2b+9b3)+(-2a2b2+7b3)
(7x2y-xy2)-(x2y-xy2)
-7s2+[8s2+(4s2-5s)+5(s2-9s)]
2+4(1-a)-(1-a-a2)+2(1-a+a2-a3)
(4a2b-6ab)+(a2b+ab)
(2b2+4b-1)+(7b2+5b-7)
(5s2+2s+1)-2(2-3s+5s2)
一、计算。
x2y-4x2y-30x2-1.5x2
11
-—a2bc-—cba2-5a2b-0.8a2b
65
11
-—ab+—ab+23a3b+0.5a3b
22
ab-4a2b2-8+5ab2-8a2b2-4-4ab
8x3-4x2+7y2-9y-x2+8y+y2
(8a2b+5b3)-(-4a2b2-9b3)
(-7x2y-xy2)+(9x2y-xy2)
-2c2+[9c2+(7c2+3c)+2(c2+2c)]
6+7(1-a)+(1-a-a2)+5(1-a+a2-a3)
(5a2b+ab)-(3a2b-ab)
(3y2-2y-7)-(9y2-4y-1)
(4z2+3z-6)-5(7-5z-5z2)
一、计算。
-4x2y+5x2y-80s2+4.5s2
11
—a2bc+—cba2-a2b-0.5a2b
33
11
—pq+—pq-7-4a2b2+9.5a2b2
66
3ab-4a2b2+9-4ab2+9a2b2+7+6ab
4x3-2x2-y2-5y+x2-3y-y2
(-6a2b-b3)+(9a2b2-b3)
(x2y-3xy2)+(7x2y-4xy2)
9c2+[7c2+(7c2+2c)-4(c2-6c)]
13-7(1-a)-(1-a-a2)+2(1-a+a2-a3)
(-3a2b-6ab)+(5a2b-9ab)
(3c2-2c+8)-(9c2-2c+5)
(3t2+3t+3)-5(4+4t+3t2)
一、计算。
8x2y+8x2y30s2+12.5s2
11
-—a2bc-—cba2-a2b-0.4a2b
42
11
—mn+—mn-2-4x3y2-6.5x3y2
55
8ab-5a2b2-9+5ab2+5a2b2+5+4ab
2x3-2x2-7y2-7y+x2+y+y2
(9a2b+b3)-(a2b2+b3)
(9x2y-xy2)-(8x2y+xy2)
-3x2+[-6x2+(8x2-7x)-2(x2-7x)]
2+2(1-a)-(1-a-a2)-5(1-a+a2-a3)
(5a2b-ab)-(-a2b-8ab)
(6m2-2m-9)-(7m2+2m+9)
(6a2-2a-4)-3(8+4a+5a2)
一、计算。
-x2y-9x2y80s2-13.5s2
11
—a2bc+—cba2-a2b-0.7a2b
46
11
-—pq-—pq+88ab2+1.5ab2
36
4ab-4a2b2-8+7ab2+6a2b2-8-8ab
4x3-6x2-8y2-7y-6x2-4y-y2
(2a2b-b3)+(a2b2-4b3)
(-x2y-5xy2)+(4x2y+6xy2)
8n2+[3n2-(9n2+7n)+6(n2-2n)]
5-5(1-a)+(1-a-a2)-4(1-a+a2-a3)
(a2b+ab)-(-a2b-ab)
(6x2+2x-8)-(3x2+4x-1)
(4m2+6m-4)+5(5+4m+3m2)
一、计算。
2x2y-2x2y90y2-13.5y2
11
-—a2bc-—cba2-a2b+0.3a2b
62
11
-—xy+—xy-52x2y2-6.5x2y2
66
ab+9a2b2+3-7ab2+6a2b2-2-2ab
4x3-7x2-y2-5y-x2-4y+y2
(a2b+b3)+(-9a2b2-b3)
(3x2y+7xy2)-(x2y-xy2)
3n2+[-4n2+(4n2+5n)-8(n2-9n)]
18-8(1-a)-(1-a-a2)-4(1-a+a2-a3)
(9a2b-ab)+(-a2b-4ab)
(9y2-5y-4)-(5y2+4y+4)
(8m2-6m+3)+5(7-6m-7m2)
一、计算。
6x2y-5x2y-40x2+5.5x2
11
—a2bc-—cba2-6a2b+0.9a2b
35
11
—st-—st+9-7x3y2-9.5x3y2
65
ab-4a2b2+1+4ab2-9a2b2-7+2ab
4x3+8x2-3y2-7y+x2-3y-y2
(4a2b+2b3)+(-a2b2+b3)
(-x2y-xy2)-(x2y-5xy2)
2t2-[7t2-(6t2-8t)+4(t2-3t)]
14+7(1-a)+(1-a-a2)-2(1-a+a2-a3)
(-a2b+4ab)-(-a2b-ab)
(2a2+4a-2)+(9a2+6a-5)
(3m2+6m-9)+5(4-6m-3m2)
一、计算。
x2y+2x2y-10n2-7.5n2
11
—a2bc+—cba2-a2b+0.5a2b
45
11
-—pq+—pq+610x3y2-8.5x3y2
65
ab+8a2b2-1+6ab2+4a2b2+4-8ab
2x3-5x2-y2-y-9x2-y-y2
(a2b-4b3)-(3a2b2+b3)
(9x2y+xy2)-(9x2y+5xy2)
-9b2-[7b2+(9b2-2b)+8(b2+3b)]
9-8(1-a)-(1-a-a2)+3(1-a+a2-a3)
(a2b+ab)-(-2a2b+ab)
(4m2-5m+9)+(9m2-2m+8)
(5n2+2n+4)-5(6-3n-5n2)
一、计算。
-x2y-2x2y-70t2+12.5t2
11
-—a2bc-—cba2-4a2b-0.6a2b
22
11
—xy+—xy-83a2b2+4.5a2b2
44
ab+4a2b2-7-5ab2+9a2b2+4+6ab
6x3+2x2+y2+y+x2-y-y2
(-a2b+9b3)+(-a2b2+b3)
(x2y+xy2)-(x2y-6xy2)
5y2-[8y2-(5y2-4y)-8(y2-5y)]
4+2(1-a)-(1-a-a2)-2(1-a+a2-a3)
(-6a2b+6ab)+(a2b-ab)
(2b2-2b+1)+(5b2-6b+6)
(9c2-5c+2)+2(6+3c+9c2)
一、计算。
2x2y+9x2y10c2+6.5c2
11
—a2bc-—cba2-3a2b-0.2a2b
55
11
-—xy+—xy+5-6x2y+5.5x2y
45
ab-7a2b2-8+6ab2+8a2b2+5+5ab
5x3+6x2+6y2+3y-x2-y+8y2
(-4a2b-7b3)+(-a2b2-7b3)
(x2y+xy2)-(8x2y-xy2)
9z2-[-8z2-(2z2+3z)+6(z2-5z)]
17+7(1-a)+(1-a-a2)-3(1-a+a2-a3)
(-3a2b+ab)+(a2b-ab)
(3c2-4c+1)-(8c2-3c-8)
(4y2-2y-6)-3(2+2y+6y2)
一、计算。
x2y-2x2y10a2+4.5a2
11
-—a2bc-—cba2-5a2b-0.2a2b
44
11
—xy+—xy+410x3y2-6.5x3y2
23
5ab+6a2b2-7-9ab2+8a2b2+8+7ab
4x3-5x2-9y2-6y-4x2-7y+2y2
(2a2b-3b3)-(7a2b2+7b3)
(x2y-xy2)-(x2y-xy2)
2s2-[-2s2+(4s2+2s)-3(s2+9s)]
12-8(1-a)-(1-a-a2)+4(1-a+a2-a3)
(-6a2b+7ab)-(-a2b-ab)
(4m2-2m+2)-(7m2+2m+3)
(9s2+3s-3)-5(3-2s-9s2)
一、计算。
-x2y-3x2y-70n2+12.5n2
11
—a2bc+—cba2-a2b+0.2a2b
33
11
-—mn-—mn-98x2y+1.5x2y
24
7ab-4a2b2+5-4ab2-2a2b2+9+4ab
7x3-6x2+y2-y+5x2+8y+5y2
(3a2b+b3)-(-3a2b2-b3)
(x2y-xy2)-(x2y-xy2)
6s2-[8s2-(3s2+8s)+9(s2+2s)]
17+4(1-a)-(1-a-a2)+3(1-a+a2-a3)
(-4a2b+ab)+(-8a2b-8ab)
(7m2+4m+3)-(8m2-3m-3)
(8x2-5x-6)+2(9-4x+9x2)
一、计算。
-x2y+6x2y-30t2-12.5t2
11
-—a2bc+—cba2-a2b+0.3a2b
35
11
-—ab-—ab+97ab2-3.5ab2
52