人教版七年级数学上册整式的加减法专项练习题精选7.docx

1、人教版七年级数学上册整式的加减法专项练习题精选7一、计算。 x2y9x2y 50s26.5s2 1 1 a2bccba2 8a2b0.6a2b 5 6 1 1 pqpq4 6a2b27.5a2b2 4 5 8ab2a2b232ab29a2b268ab 2x33x24y2yx2y6y2 (a2b3b3)(a2b22b3) (x2y2xy2)(6x2y8xy2) 8m23m2(9m22m)4(m27m) 203(1a)(1aa2)3(1aa2a3) (a2bab)(8a2b3ab) (6s24s5)(3s25s7) (7y22y7)3(42y4y2) 一、计算。 6x2y6x2y 80x20.5x

2、2 1 1 a2bccba2 5a2b0.9a2b 3 6 1 1 pqpq2 5x2y6.5x2y 2 3 4ab9a2b242ab28a2b267ab 8x34x27y2y4x2yy2 (a2b6b3)(4a2b2b3) (x2y8xy2)(x2y2xy2) 2s28s2(6s29s)7(s24s) 79(1a)(1aa2)3(1aa2a3) (3a2bab)(3a2bab) (7t23t9)(9t24t2) (3z23z4)2(54z5z2) 一、计算。 x2y9x2y 80m26.5m2 1 1 a2bccba2 4a2b0.9a2b 3 4 1 1 mnmn5 10x2y3.5x2y

3、 6 4 ab7a2b227ab27a2b272ab 4x37x2y2y7x2yy2 (5a2b3b3)(a2b25b3) (2x2y5xy2)(5x2y8xy2) 3n29n2(6n22n)9(n25n) 183(1a)(1aa2)4(1aa2a3) (a2bab)(4a2bab) (7m25m8)(8m23m4) (9y22y8)3(26y9y2) 一、计算。 2x2y8x2y 50c215.5c2 1 1 a2bccba2 6a2b0.9a2b 5 4 1 1 abab1 10x3y23.5x3y2 5 2 ab8a2b217ab22a2b255ab 9x32x2y2y8x23yy2 (

4、5a2b6b3)(9a2b2b3) (4x2yxy2)(x2y3xy2) 9b28b2(8b27b)5(b28b) 34(1a)(1aa2)2(1aa2a3) (a2bab)(a2bab) (2s23s2)(7s23s3) (9m24m5)5(33m5m2) 一、计算。 x2y8x2y 10x27.5x2 1 1 a2bccba2 a2b0.6a2b 6 3 1 1 mnmn5 4x3y21.5x3y2 6 3 ab4a2b236ab24a2b269ab 4x33x27y2y2x28y2y2 (7a2bb3)(a2b23b3) (x2y9xy2)(8x2yxy2) 8n28n2(4n25n)8

5、(n26n) 135(1a)(1aa2)2(1aa2a3) (8a2b8ab)(a2b2ab) (3t25t6)(6t22t2) (7a25a7)3(55a9a2) 一、计算。 x2y3x2y 80n20.5n2 1 1 a2bccba2 a2b0.4a2b 6 6 1 1 pqpq6 7x2y23.5x2y2 4 2 2ab6a2b289ab22a2b237ab 7x38x24y22yx2yy2 (a2b3b3)(a2b29b3) (x2y7xy2)(2x2y6xy2) 9z22z2(3z29z)7(z26z) 52(1a)(1aa2)4(1aa2a3) (3a2b6ab)(2a2b6ab)

6、 (4t26t3)(7t23t8) (5y22y7)2(95y4y2) 一、计算。 8x2y3x2y 10s20.5s2 1 1 a2bccba2 6a2b0.9a2b 5 6 1 1 stst3 7ab26.5ab2 5 5 ab5a2b282ab27a2b286ab 3x37x27y2y6x2y2y2 (a2bb3)(7a2b25b3) (7x2y7xy2)(x2y5xy2) 7n27n2(8n28n)5(n27n) 188(1a)(1aa2)5(1aa2a3) (9a2bab)(3a2bab) (9z23z4)(2z26z6) (5a25a9)2(83a4a2) 一、计算。 7x2y5x

7、2y 70z20.5z2 1 1 a2bccba2 a2b0.7a2b 2 5 1 1 xyxy1 9x3y29.5x3y2 2 2 9ab4a2b292ab26a2b222ab 2x32x25y2y8x24y7y2 (a2b3b3)(a2b2b3) (x2y8xy2)(x2y5xy2) 8m29m2(6m22m)2(m28m) 144(1a)(1aa2)5(1aa2a3) (6a2bab)(3a2bab) (6m25m1)(5m22m4) (5s23s9)5(76s9s2) 一、计算。 x2y8x2y 10n210.5n2 1 1 a2bccba2 a2b0.6a2b 4 2 1 1 mnm

8、n2 2x3y21.5x3y2 5 2 ab9a2b265ab27a2b255ab 6x33x26y28yx2yy2 (6a2bb3)(a2b29b3) (8x2y3xy2)(8x2y7xy2) 2n29n2(2n24n)7(n23n) 105(1a)(1aa2)5(1aa2a3) (a2bab)(3a2bab) (5y22y6)(2y26y4) (9t24t4)4(42t7t2) 一、计算。 x2y8x2y 60b26.5b2 1 1 a2bccba2 a2b0.2a2b 2 5 1 1 stst7 5a2b25.5a2b2 4 3 8ab5a2b292ab25a2b224ab 5x39x2

9、y2yx2y6y2 (6a2b8b3)(a2b22b3) (5x2y8xy2)(4x2y6xy2) 8x25x2(2x29x)4(x29x) 48(1a)(1aa2)4(1aa2a3) (a2bab)(a2b6ab) (7z26z5)(2z26z8) (6t23t3)5(92t8t2) 一、计算。 x2y5x2y 20a27.5a2 1 1 a2bccba2 a2b0.4a2b 2 2 1 1 stst1 4x2y24.5x2y2 4 5 2ab3a2b214ab22a2b262ab 5x35x29y2yx24y8y2 (8a2bb3)(7a2b26b3) (x2yxy2)(9x2yxy2)

10、8b28b2(8b25b)5(b26b) 148(1a)(1aa2)4(1aa2a3) (a2bab)(4a2b3ab) (3y25y3)(9y22y5) (9a25a3)3(52a9a2) 一、计算。 x2y6x2y 20t29.5t2 1 1 a2bccba2 a2b0.9a2b 6 4 1 1 xyxy5 2x2y26.5x2y2 4 2 ab6a2b218ab22a2b239ab 3x38x2y29yx25y6y2 (7a2b5b3)(4a2b24b3) (5x2y5xy2)(6x2yxy2) 6b23b2(8b28b)8(b24b) 93(1a)(1aa2)5(1aa2a3) (8a

11、2bab)(a2bab) (7z25z3)(8z25z7) (4z22z7)2(84z5z2) 一、计算。 x2y5x2y 30s214.5s2 1 1 a2bccba2 a2b0.3a2b 2 4 1 1 pqpq6 10x2y24.5x2y2 5 5 ab8a2b282ab23a2b233ab 7x34x26y27y8x2yy2 (a2bb3)(a2b2b3) (8x2yxy2)(x2y9xy2) 2c22c2(3c26c)5(c29c) 187(1a)(1aa2)3(1aa2a3) (5a2bab)(a2bab) (5z22z1)(6z22z7) (7b25b9)5(66b6b2) 一、计算。 4x2y3x2y 40z213.5z2 1 1 a2bccba2 4a2b0.3a2b 5 5 1 1 stst1