人教版七年级数学上册整式的加减法专项练习题精选17.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17一、计算。 x2y9x2y 30x210.5x2 1 1 a2bccba2 2a2b0.5a2b 3 5 1 1 xyxy9 9a2b23.5a2b2 3 4 ab7a2b229ab27a2b239ab 5x34x2y2y6x28y4y2 (a2b5b3)(8a2b2b3) (8x2y9xy2)(x2y5xy2) 3a22a2(6a25a)2(a29a) 107(1a)(1aa2)5(1aa2a3) (7a2b8ab)(6a2bab) (3m22m7)(5m26m9) (3y24y5)2(74y3y2) 一、计算。 4x2y6x2y 30b25

2、.5b2 1 1 a2bccba2 8a2b0.6a2b 5 4 1 1 xyxy4 2x2y22.5x2y2 6 5 2ab6a2b276ab25a2b265ab 3x32x2y27yx22y6y2 (6a2b7b3)(a2b29b3) (x2yxy2)(x2y2xy2) 6a24a2(2a26a)5(a26a) 162(1a)(1aa2)5(1aa2a3) (8a2b5ab)(a2b2ab) (7t22t8)(2t26t5) (8s23s6)5(42s6s2) 一、计算。 x2y6x2y 80s210.5s2 1 1 a2bccba2 6a2b0.2a2b 5 5 1 1 stst1 10

3、ab20.5ab2 4 6 3ab3a2b223ab29a2b282ab 3x38x2y2y9x28yy2 (6a2bb3)(4a2b2b3) (5x2yxy2)(x2y2xy2) 9b22b2(8b29b)7(b25b) 75(1a)(1aa2)2(1aa2a3) (a2bab)(a2bab) (6c22c8)(2c26c2) (8c26c4)2(62c8c2) 一、计算。 3x2y2x2y 10a22.5a2 1 1 a2bccba2 3a2b0.7a2b 5 4 1 1 abab10 3ab23.5ab2 4 5 5ab2a2b246ab29a2b294ab 2x33x2y26yx2y6

4、y2 (a2b7b3)(a2b27b3) (6x2yxy2)(8x2y9xy2) 7s23s2(8s28s)7(s22s) 148(1a)(1aa2)3(1aa2a3) (6a2b8ab)(a2bab) (4x22x1)(7x25x3) (3y25y9)4(44y2y2) 一、计算。 7x2y3x2y 30b217.5b2 1 1 a2bccba2 2a2b0.4a2b 5 3 1 1 stst2 5x2y1.5x2y 4 6 8ab3a2b248ab23a2b286ab 9x37x26y2y7x2yy2 (a2bb3)(4a2b2b3) (x2yxy2)(6x2yxy2) 3b27b2(5b

5、26b)3(b27b) 88(1a)(1aa2)5(1aa2a3) (9a2bab)(5a2b3ab) (7m26m6)(3m22m6) (3t25t8)3(34t5t2) 一、计算。 5x2y7x2y 90x29.5x2 1 1 a2bccba2 5a2b0.4a2b 5 2 1 1 mnmn10 3x3y20.5x3y2 2 3 5ab4a2b237ab22a2b279ab 7x32x22y2yx2y6y2 (3a2b7b3)(9a2b25b3) (x2y6xy2)(2x2yxy2) 3y27y2(3y22y)3(y27y) 43(1a)(1aa2)5(1aa2a3) (4a2bab)(a

6、2bab) (9n24n3)(6n24n1) (7c24c7)2(34c3c2) 一、计算。 x2y2x2y 90a210.5a2 1 1 a2bccba2 9a2b0.9a2b 6 3 1 1 xyxy10 7a3b0.5a3b 4 4 ab3a2b296ab25a2b267ab 8x34x2y23y9x29yy2 (a2b4b3)(5a2b28b3) (x2yxy2)(3x2yxy2) 9n29n2(2n26n)9(n22n) 25(1a)(1aa2)5(1aa2a3) (7a2b4ab)(a2bab) (9c22c7)(4c24c1) (3z24z5)3(74z6z2) 一、计算。 x2

7、y4x2y 40a217.5a2 1 1 a2bccba2 a2b0.8a2b 2 3 1 1 stst7 5x2y1.5x2y 6 2 8ab4a2b267ab23a2b237ab 5x34x22y22yx2yy2 (a2b3b3)(a2b2b3) (5x2yxy2)(x2yxy2) 7n24n2(5n26n)3(n23n) 99(1a)(1aa2)3(1aa2a3) (8a2b9ab)(a2b7ab) (5m23m1)(5m25m7) (4s23s8)3(33s9s2) 一、计算。 x2y8x2y 100m25.5m2 1 1 a2bccba2 7a2b0.7a2b 6 2 1 1 sts

8、t7 4ab27.5ab2 3 2 6ab7a2b232ab28a2b287ab 4x32x2y2yx26y7y2 (a2b9b3)(6a2b2b3) (x2yxy2)(x2y7xy2) 8m29m2(6m27m)2(m23m) 67(1a)(1aa2)5(1aa2a3) (a2b5ab)(a2b4ab) (5b23b2)(9b25b5) (7y25y9)5(32y6y2) 一、计算。 8x2y4x2y 50n219.5n2 1 1 a2bccba2 a2b0.8a2b 6 4 1 1 pqpq10 7x2y0.5x2y 4 5 ab6a2b224ab22a2b284ab 3x35x26y2y

9、x2y4y2 (9a2bb3)(a2b25b3) (x2y2xy2)(8x2y2xy2) 4a24a2(3a26a)3(a28a) 96(1a)(1aa2)4(1aa2a3) (8a2bab)(a2b9ab) (5n26n8)(4n24n5) (8c23c9)4(83c6c2) 一、计算。 8x2y4x2y 70t27.5t2 1 1 a2bccba2 5a2b0.2a2b 2 5 1 1 pqpq2 2ab29.5ab2 6 3 ab6a2b258ab27a2b252ab 9x35x2y29yx24yy2 (4a2bb3)(a2b2b3) (2x2y2xy2)(5x2y3xy2) 3y26y

10、2(8y25y)5(y27y) 63(1a)(1aa2)2(1aa2a3) (2a2b3ab)(5a2b3ab) (4z23z5)(2z24z1) (5a24a9)5(72a2a2) 一、计算。 x2y5x2y 60m26.5m2 1 1 a2bccba2 a2b0.9a2b 6 3 1 1 mnmn7 2x3y28.5x3y2 2 6 ab5a2b257ab25a2b262ab 8x37x22y24y8x27yy2 (8a2bb3)(a2b26b3) (8x2yxy2)(4x2y2xy2) 2s25s2(7s26s)5(s26s) 128(1a)(1aa2)2(1aa2a3) (a2bab)

11、(6a2b5ab) (7a25a3)(3a24a5) (8t22t3)3(23t9t2) 一、计算。 x2y5x2y 80s218.5s2 1 1 a2bccba2 a2b0.4a2b 3 2 1 1 mnmn6 5a2b23.5a2b2 3 2 7ab9a2b242ab29a2b223ab 2x38x2y2y6x23yy2 (5a2b8b3)(6a2b2b3) (x2yxy2)(2x2yxy2) 9n22n2(4n22n)3(n24n) 164(1a)(1aa2)3(1aa2a3) (3a2bab)(6a2b6ab) (3t23t8)(3t22t8) (8n26n9)4(53n7n2) 一、计算。 x2y3x2y 70x20.5x2 1 1 a2bccba2 2a2b0.9a2b 6 2 1 1 xyxy8