人教版七年级数学上册整式的加减法专项练习题精选47.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47
一、计算。
2x2y+8x2y-30s2-4.5s2
11
-—a2bc+—cba23a2b-0.6a2b
53
11
—st-—st-56ab2+2.5ab2
25
ab+2a2b2-4+6ab2+2a2b2-4-9ab
9x3-3x2+8y2-4y-x2+8y-6y2
(a2b+b3)-(6a2b2+7b3)
(x2y+5xy2)-(x2y+xy2)
3a2-[-7a2+(9a2-3a)+7(a2+6a)]
6+7(1-a)-(1-a-a2)-5(1-a+a2-a3)
(-a2b+4ab)+(8a2b-4ab)
(7s2-5s+4)-(9s2-3s+8)
(4n2+2n+4)-2(8-6n+4n2)
一、计算。
x2y-7x2y10c2-5.5c2
11
—a2bc-—cba2-a2b-0.7a2b
53
11
-—st+—st-4-6a3b-7.5a3b
25
5ab+6a2b2-2-3ab2-8a2b2+2-9ab
9x3-7x2+y2+y-x2+9y+y2
(4a2b-3b3)-(a2b2+3b3)
(-8x2y-5xy2)-(x2y+xy2)
7c2+[-5c2+(6c2+6c)+9(c2-5c)]
18+2(1-a)+(1-a-a2)+4(1-a+a2-a3)
(-a2b+7ab)-(a2b+ab)
(8s2-4s-8)-(9s2-6s-1)
(5z2-3z+3)+2(6+3z+2z2)
一、计算。
5x2y+5x2y-80n2+8.5n2
11
-—a2bc+—cba2-a2b+0.9a2b
43
11
-—pq-—pq+2-10ab2-2.5ab2
25
ab+8a2b2+7+4ab2-6a2b2-8-5ab
3x3+3x2-y2-y+x2-y-6y2
(-a2b-b3)+(9a2b2-3b3)
(-5x2y-xy2)-(x2y+xy2)
2t2-[-6t2+(3t2+9t)+7(t2+4t)]
14+5(1-a)+(1-a-a2)+5(1-a+a2-a3)
(a2b+7ab)+(a2b-ab)
(5t2-4t-5)-(5t2+6t-4)
(4a2-6a+3)+3(2+5a-8a2)
一、计算。
3x2y+6x2y-50m2+16.5m2
11
-—a2bc-—cba2-7a2b+0.5a2b
25
11
—xy+—xy-94ab2-7.5ab2
46
7ab-4a2b2+8-7ab2-7a2b2+9-3ab
6x3-2x2-3y2+y+3x2+y+9y2
(a2b-b3)+(-a2b2-b3)
(x2y-3xy2)-(5x2y+xy2)
8t2-[-7t2+(5t2+6t)+7(t2+9t)]
11+6(1-a)-(1-a-a2)-5(1-a+a2-a3)
(a2b+6ab)-(a2b-ab)
(6a2-6a+9)+(5a2+4a-7)
(8m2+4m-5)+4(4-2m-4m2)
一、计算。
x2y-6x2y-60s2-3.5s2
11
-—a2bc+—cba2-a2b-0.6a2b
46
11
-—xy-—xy+6-5a2b2-6.5a2b2
52
ab-4a2b2-9+2ab2-6a2b2-6-3ab
9x3-6x2+y2-y+4x2-y+8y2
(a2b+b3)-(6a2b2-6b3)
(9x2y-xy2)+(2x2y+xy2)
8a2-[-4a2-(9a2+2a)-4(a2+3a)]
5+4(1-a)+(1-a-a2)+5(1-a+a2-a3)
(a2b-2ab)+(9a2b+ab)
(3t2-3t+4)+(7t2-4t-1)
(3y2+3y-6)-3(9+2y-3y2)
一、计算。
x2y+8x2y50b2-6.5b2
11
—a2bc-—cba2-4a2b+0.4a2b
32
11
—pq-—pq-45x2y2+0.5x2y2
42
ab+4a2b2+1-3ab2-8a2b2+9-4ab
2x3-8x2-4y2-3y+2x2+8y+6y2
(7a2b-b3)-(3a2b2+2b3)
(-6x2y+8xy2)+(x2y+4xy2)
-7y2-[3y2-(8y2-9y)+4(y2+8y)]
8+2(1-a)-(1-a-a2)-4(1-a+a2-a3)
(a2b-3ab)+(-2a2b-ab)
(8b2+6b-3)+(3b2+4b+8)
(7c2+5c-6)-4(2+5c-8c2)
一、计算。
-4x2y-2x2y-90m2-13.5m2
11
—a2bc+—cba2-7a2b+0.6a2b
56
11
—st-—st+63a2b2-2.5a2b2
46
3ab-4a2b2+1-9ab2+4a2b2+6-5ab
8x3-2x2-7y2+y+x2-y+y2
(-6a2b+b3)+(-3a2b2-b3)
(-9x2y+2xy2)+(x2y-2xy2)
7x2+[8x2-(9x2-3x)+9(x2+5x)]
12-5(1-a)+(1-a-a2)-3(1-a+a2-a3)
(7a2b-5ab)-(-a2b-ab)
(6c2+3c-3)+(2c2-6c-5)
(3z2-5z-2)+4(8+2z-5z2)
一、计算。
x2y-7x2y20x2-1.5x2
11
-—a2bc-—cba2a2b-0.4a2b
34
11
—mn+—mn+3-9ab2-2.5ab2
64
ab-7a2b2-3+6ab2-5a2b2+6+7ab
2x3+7x2-3y2+y+x2-y+y2
(-4a2b-b3)-(7a2b2-6b3)
(2x2y+7xy2)+(9x2y-xy2)
-5y2+[4y2-(7y2-6y)+6(y2-4y)]
20+5(1-a)-(1-a-a2)-3(1-a+a2-a3)
(-a2b-2ab)+(-5a2b-ab)
(5n2-6n-2)-(9n2+4n-6)
(8z2-5z+7)-5(6-3z+6z2)
一、计算。
-x2y-8x2y-30m2+9.5m2
11
—a2bc-—cba2-6a2b+0.6a2b
36
11
—xy+—xy+2-8x2y2-6.5x2y2
42
ab+4a2b2-6+5ab2-2a2b2+7+3ab
3x3+8x2-6y2+4y+x2+5y+2y2
(a2b+b3)-(3a2b2+b3)
(-x2y-2xy2)+(6x2y+4xy2)
-7s2-[9s2-(3s2+9s)-6(s2+9s)]
18-9(1-a)+(1-a-a2)-3(1-a+a2-a3)
(8a2b-ab)-(5a2b+ab)
(4t2-2t-1)-(8t2-3t-9)
(3x2+6x+2)+3(8+5x+5x2)
一、计算。
-8x2y+4x2y-20b2+9.5b2
11
-—a2bc-—cba2-5a2b+0.4a2b
45
11
-—mn-—mn-69ab2-8.5ab2
42
ab-5a2b2+9-9ab2+4a2b2-1-7ab
3x3+7x2+y2+y-9x2-y+9y2
(-a2b+3b3)-(3a2b2-3b3)
(7x2y-2xy2)+(x2y+xy2)
3m2+[-9m2+(3m2-3m)-7(m2+5m)]
19-6(1-a)-(1-a-a2)+5(1-a+a2-a3)
(a2b-4ab)-(2a2b-ab)
(3z2-6z-5)-(5z2+6z-3)
(3c2-6c+8)-2(5+3c+2c2)
一、计算。
8x2y+4x2y-50m2+9.5m2
11
—a2bc-—cba2-a2b+0.9a2b
26
11
-—xy+—xy-8-2x3y2-8.5x3y2
33
5ab-4a2b2+5-6ab2-9a2b2+9-6ab
9x3+4x2+5y2+7y+7x2-8y+y2
(6a2b+b3)-(-a2b2+7b3)
(5x2y+xy2)-(5x2y-xy2)
4x2+[7x2-(3x2-4x)-3(x2+9x)]
19+9(1-a)+(1-a-a2)-2(1-a+a2-a3)
(-a2b+5ab)-(-8a2b-8ab)
(7x2+5x-7)-(3x2+2x-9)
(6z2-2z+1)+5(4-6z-4z2)
一、计算。
-3x2y-3x2y-60n2-1.5n2
11
-—a2bc+—cba25a2b+0.3a2b
42
11
-—pq+—pq-47x2y2+7.5x2y2
44
ab-7a2b2+7-6ab2-8a2b2+5-5ab
3x3+3x2+2y2-4y+x2+y+7y2
(3a2b-7b3)-(-7a2b2+b3)
(-7x2y+xy2)+(5x2y-8xy2)
9y2+[-5y2+(2y2+5y)+6(y2+9y)]
12-3(1-a)-(1-a-a2)+5(1-a+a2-a3)
(7a2b+4ab)-(a2b+ab)
(5b2-2b-9)+(9b2-2b+1)
(2n2+2n+2)+2(3-6n-3n2)
一、计算。
x2y-9x2y80a2-18.5a2
11
—a2bc+—cba2-9a2b+0.8a2b
36
11
-—st-—st+59x2y2+4.5x2y2
66
ab+5a2b2-3+3ab2+8a2b2+9+9ab
7x3-2x2-8y2-7y-x2-y-y2
(a2b-b3)-(-9a2b2+b3)
(-x2y+xy2)+(7x2y-xy2)
-6x2-[-8x2+(7x2+7x)-8(x2-6x)]
15+4(1-a)-(1-a-a2)-4(1-a+a2-a3)
(-8a2b-5ab)+(a2b-ab)
(6t2+6t-5)+(4t2+4t-3)
(3a2-4a-3)-5(3+6a-4a2)
一、计算。
4x2y+7x2y10z2-16.5z2
11
—a2bc+—cba2-a2b-0.5a2b
32
11
-—ab+—ab-8-3x2y2-5.5x2y2
54