人教版七年级数学上册整式的加减法复习题精选3.docx
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人教版七年级数学上册整式的加减法复习题精选3
一、计算。
-5x2y-6x2y70n2+4.5n2
11
-—a2bc-—cba2-9a2b+0.5a2b
32
11
—pq-—pq-104a3b+6.5a3b
22
ab+2a2b2+5-2ab2+6a2b2-9-2ab
5x3+3x2-7y2-2y-x2-4y-9y2
(3a2b-b3)+(-6a2b2-b3)
(-6x2y+7xy2)-(x2y-8xy2)
-6m2+[6m2+(9m2+2m)+9(m2-9m)]
8-2(1-a)+(1-a-a2)-4(1-a+a2-a3)
(3a2b+5ab)-(5a2b+ab)
(8c2+6c+6)-(6c2-6c-5)
(9y2+5y+3)+5(4-4y-3y2)
一、计算。
8x2y-6x2y-10b2+0.5b2
11
—a2bc+—cba24a2b-0.4a2b
32
11
-—xy-—xy-4-2x2y2-2.5x2y2
34
4ab+8a2b2+2-9ab2+4a2b2+6-7ab
4x3-4x2+y2+y+8x2-6y-y2
(-a2b-8b3)+(5a2b2+b3)
(x2y+3xy2)+(x2y+xy2)
5a2+[-6a2-(8a2+4a)+4(a2+9a)]
10-9(1-a)+(1-a-a2)-5(1-a+a2-a3)
(a2b+ab)+(-a2b-7ab)
(6x2-4x-6)-(4x2+3x+6)
(9y2+6y-9)-3(6+4y+5y2)
一、计算。
9x2y+5x2y-20y2-15.5y2
11
—a2bc-—cba2-a2b-0.5a2b
32
11
-—xy+—xy+2-9x2y-8.5x2y
64
ab-8a2b2+8-6ab2-3a2b2+8+4ab
5x3+6x2+y2+3y+x2+y+y2
(-9a2b-2b3)+(a2b2+9b3)
(7x2y+3xy2)-(2x2y-5xy2)
-8m2-[-4m2-(8m2-7m)-5(m2+5m)]
3-4(1-a)+(1-a-a2)+4(1-a+a2-a3)
(-a2b+4ab)+(a2b+ab)
(3a2+4a+1)-(2a2-5a+7)
(5a2+4a+3)-3(2-6a-2a2)
一、计算。
-7x2y-5x2y-10y2+0.5y2
11
-—a2bc-—cba23a2b-0.4a2b
54
11
-—xy-—xy-77ab2-7.5ab2
56
2ab-2a2b2+2-6ab2-8a2b2+6+8ab
4x3+8x2+2y2-y-x2+y+y2
(3a2b+8b3)+(9a2b2+b3)
(8x2y-8xy2)+(2x2y+4xy2)
9b2-[-8b2-(2b2+4b)+2(b2+4b)]
11+3(1-a)+(1-a-a2)+4(1-a+a2-a3)
(a2b-2ab)-(-a2b-4ab)
(4t2+5t+5)+(7t2+4t-4)
(5m2-4m+5)+4(2+3m+4m2)
一、计算。
-2x2y+5x2y-20m2+7.5m2
11
—a2bc+—cba2-8a2b-0.6a2b
33
11
—mn-—mn+1010x2y2+8.5x2y2
25
ab+5a2b2-9-3ab2-8a2b2+9+6ab
7x3-6x2+7y2+9y+6x2-5y+9y2
(-9a2b-2b3)+(-8a2b2-2b3)
(-5x2y-xy2)-(4x2y+5xy2)
9x2+[8x2+(2x2+7x)+4(x2+6x)]
5+5(1-a)+(1-a-a2)+5(1-a+a2-a3)
(a2b-5ab)-(-a2b-ab)
(7n2-4n-7)-(8n2+4n-8)
(6n2+4n-6)+4(9+5n+4n2)
一、计算。
2x2y+5x2y-50m2+16.5m2
11
-—a2bc-—cba2-7a2b+0.2a2b
34
11
—mn-—mn+63x2y+9.5x2y
43
ab+6a2b2-2+3ab2-5a2b2+2-9ab
2x3+3x2+5y2+5y-4x2-7y+5y2
(-8a2b-6b3)-(-a2b2+6b3)
(x2y-2xy2)+(x2y+xy2)
-8t2-[7t2-(7t2-2t)-3(t2-6t)]
19+4(1-a)-(1-a-a2)+4(1-a+a2-a3)
(-5a2b-ab)-(-2a2b-6ab)
(4s2+3s+3)-(5s2+6s+1)
(3c2-4c-7)-3(2-2c+4c2)
一、计算。
x2y-9x2y-10c2+7.5c2
11
—a2bc+—cba2-a2b+0.5a2b
46
11
-—ab-—ab+2-2a3b-4.5a3b
34
ab+4a2b2-3+9ab2+6a2b2-7-8ab
7x3+7x2+y2+y+x2-7y-y2
(a2b-b3)+(-7a2b2+6b3)
(-x2y-7xy2)-(3x2y-xy2)