人教版七年级数学上册整式的加减法专项练习题精选9.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9
一、计算。
x2y+5x2y40s2-13.5s2
11
—a2bc-—cba2a2b+0.7a2b
66
11
-—pq-—pq-4-10ab2-9.5ab2
56
6ab+3a2b2+6-2ab2+5a2b2-1-6ab
9x3-6x2-y2-3y-7x2+y-7y2
(-9a2b+4b3)+(-8a2b2+3b3)
(4x2y+xy2)+(x2y-xy2)
8t2-[-8t2-(6t2+8t)-3(t2+9t)]
9+4(1-a)+(1-a-a2)-3(1-a+a2-a3)
(a2b-ab)-(-a2b+ab)
(4y2+2y-1)+(6y2-3y+9)
(3n2-5n+6)+4(2-6n-9n2)
一、计算。
-2x2y-5x2y-40y2+13.5y2
11
-—a2bc+—cba23a2b-0.6a2b
54
11
—ab-—ab+1-2x3y2-4.5x3y2
34
ab-9a2b2+5+3ab2+9a2b2-8+9ab
3x3+4x2-y2+y-x2-2y+y2
(-6a2b+b3)+(a2b2+6b3)
(x2y-4xy2)-(x2y-xy2)
-7y2+[8y2-(3y2-6y)-9(y2-2y)]
20-3(1-a)+(1-a-a2)+2(1-a+a2-a3)
(-2a2b-ab)+(-a2b+ab)
(9y2+3y+7)+(7y2+4y+7)
(5n2-3n+6)+3(5-3n+7n2)
一、计算。
-3x2y-2x2y40a2+0.5a2
11
—a2bc+—cba28a2b-0.5a2b
35
11
-—mn+—mn-6-2ab2+7.5ab2
26
9ab+2a2b2-7+7ab2-8a2b2-7-3ab
3x3-3x2-y2-4y-x2+y-9y2
(a2b+b3)-(-2a2b2+b3)
(-x2y-4xy2)+(x2y-xy2)
5a2+[4a2-(6a2-2a)+7(a2+8a)]
18+4(1-a)+(1-a-a2)-4(1-a+a2-a3)
(-a2b-9ab)+(a2b+ab)
(8z2+2z+2)-(8z2-4z-2)
(3n2-4n+6)-2(9-4n+8n2)
一、计算。
-4x2y-5x2y-90t2-1.5t2
11
-—a2bc-—cba2a2b+0.7a2b
53
11
-—mn+—mn-10-9a2b2-4.5a2b2
32
ab+8a2b2-7-3ab2-4a2b2-1-7ab
3x3-2x2+7y2-y-4x2-y+5y2
(a2b+b3)+(-8a2b2-4b3)
(-5x2y+xy2)+(x2y-xy2)
-6c2+[5c2-(8c2+3c)+3(c2+4c)]
6-8(1-a)-(1-a-a2)+4(1-a+a2-a3)
(-a2b+6ab)+(5a2b+ab)
(4b2-2b+2)+(7b2-5b-3)
(8y2-3y+8)+5(6+2y+2y2)
一、计算。
-x2y+4x2y100y2+1.5y2
11
-—a2bc-—cba23a2b-0.3a2b
56
11
—pq-—pq-1-8x3y2+8.5x3y2
46
ab-5a2b2-8-6ab2-7a2b2+1-5ab
4x3+6x2-7y2+5y-2x2+y+y2
(a2b-9b3)+(-6a2b2-b3)
(9x2y-xy2)+(x2y-xy2)
-9t2-[5t2-(4t2-3t)+5(t2-8t)]
11-7(1-a)+(1-a-a2)+2(1-a+a2-a3)
(-2a2b+ab)+(-8a2b+7ab)
(7a2+3a-5)+(4a2+3a+3)
(4t2+4t+4)+2(6-6t-3t2)
一、计算。
8x2y+6x2y-80c2+10.5c2
11
—a2bc-—cba2-7a2b+0.4a2b
22
11
—ab-—ab+2-4ab2+0.5ab2
65
9ab-3a2b2-4-3ab2+6a2b2-8-5ab
2x3-4x2+9y2-9y+x2+y-4y2
(9a2b-3b3)+(-a2b2+8b3)
(x2y-xy2)-(5x2y-xy2)
-7b2+[-6b2+(8b2+6b)+4(b2-3b)]
8+9(1-a)-(1-a-a2)-2(1-a+a2-a3)
(-8a2b-ab)-(-a2b-ab)
(7y2+3y+2)-(7y2-2y-2)
(7s2+4s+7)-3(8-2s+4s2)
一、计算。
-4x2y-6x2y-10t2-7.5t2
11
-—a2bc-—cba2-4a2b+0.4a2b
52
11
—st-—st+2-4x2y2-0.5x2y2
52
6ab+8a2b2-6+9ab2+2a2b2+3+2ab
5x3-2x2+y2+7y+x2-9y+y2
(a2b+3b3)-(3a2b2-b3)
(4x2y+3xy2)-(x2y-xy2)