人教版七年级数学上册整式的加减法练习题精选12.docx

1、人教版七年级数学上册整式的加减法练习题精选12一、计算。 x2y3x2y 70m210.5m2 1 1 a2bccba2 7a2b0.3a2b 4 6 1 1 pqpq8 7x3y20.5x3y2 3 3 ab8a2b287ab28a2b245ab 6x38x25y2yx2y3y2 (5a2b5b3)(a2b25b3) (x2y5xy2)(2x2y4xy2) 3z24z2(5z24z)7(z25z) 169(1a)(1aa2)4(1aa2a3) (8a2b7ab)(8a2b3ab) (3t23t4)(5t26t5) (5t24t4)5(96t7t2) 一、计算。 x2y6x2y 40y216.

2、5y2 1 1 a2bccba2 a2b0.9a2b 5 2 1 1 stst2 5x2y7.5x2y 5 6 5ab7a2b272ab23a2b288ab 7x39x25y26y9x2yy2 (6a2b2b3)(4a2b2b3) (x2y4xy2)(x2y8xy2) 4c29c2(6c22c)4(c22c) 86(1a)(1aa2)2(1aa2a3) (a2b9ab)(a2bab) (3y24y1)(8y24y6) (2x23x3)3(34x4x2) 一、计算。 2x2y4x2y 60m212.5m2 1 1 a2bccba2 a2b0.6a2b 5 6 1 1 abab1 6a2b23.5

3、a2b2 4 4 9ab3a2b217ab25a2b246ab 7x34x28y23yx23y4y2 (a2b5b3)(4a2b22b3) (x2y4xy2)(x2y9xy2) 9s22s2(3s25s)4(s27s) 97(1a)(1aa2)2(1aa2a3) (a2bab)(5a2bab) (8m26m6)(7m23m3) (9b25b5)2(43b6b2) 一、计算。 4x2y9x2y 90z23.5z2 1 1 a2bccba2 a2b0.7a2b 5 6 1 1 xyxy9 8a2b20.5a2b2 5 2 ab7a2b246ab29a2b255ab 3x35x2y2y3x2y7y2

4、 (a2b3b3)(8a2b23b3) (7x2y9xy2)(9x2yxy2) 6t26t2(3t27t)9(t22t) 139(1a)(1aa2)4(1aa2a3) (3a2bab)(a2b8ab) (9z24z2)(8z24z5) (7n26n9)3(82n7n2) 一、计算。 4x2y3x2y 80n20.5n2 1 1 a2bccba2 9a2b0.3a2b 6 2 1 1 abab7 9ab24.5ab2 6 3 ab6a2b229ab26a2b286ab 3x36x22y23y6x28y8y2 (3a2bb3)(a2b25b3) (4x2yxy2)(x2y3xy2) 2z22z2(

5、6z23z)2(z22z) 106(1a)(1aa2)4(1aa2a3) (5a2b5ab)(a2bab) (4y26y5)(3y22y3) (3a24a3)3(32a8a2) 一、计算。 4x2y2x2y 90z212.5z2 1 1 a2bccba2 4a2b0.9a2b 5 6 1 1 pqpq5 8ab27.5ab2 2 5 2ab4a2b287ab24a2b288ab 7x35x28y28yx2yy2 (8a2bb3)(a2b27b3) (x2y5xy2)(9x2yxy2) 5c27c2(3c22c)9(c26c) 53(1a)(1aa2)3(1aa2a3) (a2bab)(a2b6

6、ab) (3m24m7)(6m26m5) (9s26s9)3(96s6s2) 一、计算。 9x2y8x2y 50b22.5b2 1 1 a2bccba2 a2b0.8a2b 3 5 1 1 xyxy5 7x2y20.5x2y2 4 5 9ab6a2b244ab29a2b228ab 7x39x27y2yx27yy2 (a2b3b3)(a2b29b3) (9x2yxy2)(x2yxy2) 7a25a2(5a28a)7(a25a) 36(1a)(1aa2)2(1aa2a3) (5a2b6ab)(a2bab) (7n25n6)(9n23n8) (8x24x2)2(92x9x2) 一、计算。 x2y2x

7、2y 10n217.5n2 1 1 a2bccba2 4a2b0.8a2b 4 2 1 1 stst9 3x3y26.5x3y2 5 4 2ab3a2b287ab23a2b212ab 9x35x25y2yx2y7y2 (4a2b2b3)(a2b29b3) (8x2yxy2)(7x2y9xy2) 5t27t2(3t24t)4(t26t) 64(1a)(1aa2)3(1aa2a3) (a2b8ab)(7a2b2ab) (6y22y9)(4y25y3) (6y23y7)3(64y4y2) 一、计算。 5x2y5x2y 60s27.5s2 1 1 a2bccba2 a2b0.4a2b 2 3 1 1

8、stst10 2x3y20.5x3y2 4 6 ab3a2b265ab28a2b299ab 6x34x2y27yx2y6y2 (a2bb3)(7a2b26b3) (x2yxy2)(6x2yxy2) 8a26a2(4a22a)5(a25a) 183(1a)(1aa2)5(1aa2a3) (9a2bab)(9a2b8ab) (5t25t5)(3t23t7) (3s23s5)4(63s5s2) 一、计算。 9x2y3x2y 80s23.5s2 1 1 a2bccba2 5a2b0.6a2b 4 2 1 1 pqpq4 5x3y25.5x3y2 4 5 6ab2a2b212ab25a2b257ab 6

9、x35x22y27yx2yy2 (2a2b5b3)(a2b2b3) (x2y6xy2)(x2yxy2) 8a27a2(6a27a)4(a28a) 208(1a)(1aa2)2(1aa2a3) (a2bab)(3a2b9ab) (8t25t5)(6t22t2) (6x22x9)5(76x6x2) 一、计算。 x2y3x2y 40y25.5y2 1 1 a2bccba2 a2b0.5a2b 3 5 1 1 abab6 9x2y27.5x2y2 2 5 ab2a2b244ab29a2b272ab 3x39x26y2yx2y5y2 (5a2b5b3)(2a2b2b3) (2x2y5xy2)(9x2yx

10、y2) 2a29a2(5a24a)3(a28a) 43(1a)(1aa2)5(1aa2a3) (a2b5ab)(6a2bab) (7s24s7)(3s26s3) (6b24b2)4(96b7b2) 一、计算。 9x2y7x2y 50t28.5t2 1 1 a2bccba2 6a2b0.6a2b 6 5 1 1 xyxy5 6x2y8.5x2y 6 6 ab8a2b235ab26a2b276ab 5x34x27y29y8x24y7y2 (a2b9b3)(2a2b2b3) (x2yxy2)(3x2yxy2) 3a27a2(2a24a)8(a26a) 72(1a)(1aa2)4(1aa2a3) (6

11、a2bab)(a2bab) (4z26z4)(9z26z1) (7b22b3)5(93b2b2) 一、计算。 x2y4x2y 40z26.5z2 1 1 a2bccba2 a2b0.8a2b 6 6 1 1 pqpq8 9ab22.5ab2 5 6 5ab5a2b296ab22a2b239ab 6x34x29y25y9x2yy2 (a2bb3)(3a2b2b3) (x2yxy2)(x2yxy2) 2m28m2(4m26m)5(m22m) 65(1a)(1aa2)2(1aa2a3) (a2b7ab)(4a2bab) (7b24b9)(3b24b6) (7t23t6)4(66t7t2) 一、计算。 8x2y9x2y 10x210.5x2 1 1 a2bccba2 a2b0.3a2b 3 2 1 1 stst4 6a3b2.5a3