1、人教版七年级数学上册整式的加减法练习题精选23一、计算。 x2y5x2y 90t29.5t2 1 1 a2bccba2 4a2b0.9a2b 6 4 1 1 mnmn7 6x3y24.5x3y2 5 4 8ab4a2b222ab22a2b223ab 6x35x2y26yx22y7y2 (a2bb3)(a2b23b3) (3x2yxy2)(2x2yxy2) 3a23a2(9a26a)4(a22a) 85(1a)(1aa2)2(1aa2a3) (a2bab)(2a2bab) (2s26s2)(9s23s5) (2b24b3)5(42b9b2) 一、计算。 x2y7x2y 60n21.5n2 1 1
2、 a2bccba2 2a2b0.2a2b 2 6 1 1 mnmn4 7x2y28.5x2y2 4 5 ab8a2b292ab26a2b229ab 2x35x2y2y5x26y4y2 (7a2bb3)(a2b25b3) (x2yxy2)(2x2y6xy2) 4m25m2(6m22m)3(m26m) 57(1a)(1aa2)3(1aa2a3) (8a2bab)(8a2b9ab) (7n25n6)(7n24n7) (4z26z3)4(54z7z2) 一、计算。 x2y7x2y 80b211.5b2 1 1 a2bccba2 2a2b0.2a2b 6 6 1 1 mnmn2 2ab22.5ab2 3
3、 5 ab8a2b242ab29a2b269ab 9x36x2y29yx2yy2 (a2bb3)(a2b2b3) (3x2yxy2)(6x2y2xy2) 4c29c2(2c24c)2(c28c) 158(1a)(1aa2)2(1aa2a3) (a2bab)(a2bab) (5a24a1)(5a25a1) (8n22n1)2(66n7n2) 一、计算。 x2y4x2y 30c218.5c2 1 1 a2bccba2 a2b0.6a2b 4 6 1 1 stst10 7a3b8.5a3b 2 5 ab2a2b285ab27a2b287ab 2x34x2y2y2x23yy2 (6a2b9b3)(a2
4、b2b3) (x2y8xy2)(x2yxy2) 7x25x2(5x25x)8(x24x) 24(1a)(1aa2)3(1aa2a3) (2a2b8ab)(8a2b8ab) (3b26b5)(2b22b6) (2c22c2)4(92c8c2) 一、计算。 x2y8x2y 40t25.5t2 1 1 a2bccba2 6a2b0.4a2b 3 5 1 1 pqpq6 6a2b22.5a2b2 2 4 ab8a2b279ab28a2b275ab 9x38x29y2y8x2y6y2 (9a2bb3)(4a2b25b3) (x2yxy2)(x2y8xy2) 4c28c2(4c27c)3(c24c) 13
5、5(1a)(1aa2)5(1aa2a3) (6a2bab)(a2b6ab) (8c26c5)(7c22c7) (6n26n6)3(75n6n2) 一、计算。 7x2y3x2y 60n22.5n2 1 1 a2bccba2 5a2b0.6a2b 5 2 1 1 xyxy7 7x2y0.5x2y 4 4 7ab4a2b223ab25a2b248ab 5x34x2y2y8x2yy2 (a2bb3)(a2b2b3) (7x2yxy2)(x2y9xy2) 6t22t2(3t24t)9(t23t) 106(1a)(1aa2)5(1aa2a3) (2a2bab)(4a2b8ab) (4x25x2)(7x22
6、x6) (2y23y1)3(35y6y2) 一、计算。 x2y2x2y 90z215.5z2 1 1 a2bccba2 a2b0.6a2b 6 4 1 1 pqpq2 5x2y8.5x2y 6 5 ab8a2b213ab27a2b292ab 2x35x27y2yx23yy2 (a2bb3)(7a2b2b3) (x2yxy2)(x2y7xy2) 2z27z2(6z22z)4(z25z) 126(1a)(1aa2)4(1aa2a3) (a2bab)(9a2bab) (3z22z6)(8z26z6) (4b24b5)3(33b8b2) 一、计算。 x2y6x2y 40m215.5m2 1 1 a2b
7、ccba2 8a2b0.2a2b 2 3 1 1 abab2 10x2y6.5x2y 4 5 ab5a2b276ab28a2b226ab 3x37x28y24yx29yy2 (9a2b2b3)(a2b2b3) (x2y6xy2)(x2yxy2) 7t29t2(8t28t)9(t26t) 174(1a)(1aa2)4(1aa2a3) (a2bab)(6a2b5ab) (2z23z3)(8z25z6) (6a23a9)5(56a9a2) 一、计算。 x2y8x2y 40z211.5z2 1 1 a2bccba2 a2b0.2a2b 2 4 1 1 pqpq1 10a3b5.5a3b 2 5 ab3
8、a2b214ab28a2b266ab 6x34x29y25yx22y2y2 (a2bb3)(a2b27b3) (x2y9xy2)(x2yxy2) 6x27x2(4x23x)8(x27x) 39(1a)(1aa2)4(1aa2a3) (a2b3ab)(a2bab) (8m24m9)(7m25m1) (3n26n9)4(23n4n2) 一、计算。 x2y3x2y 10z215.5z2 1 1 a2bccba2 a2b0.9a2b 4 4 1 1 xyxy3 9ab28.5ab2 3 4 2ab7a2b296ab25a2b259ab 2x33x25y2y4x22yy2 (5a2b8b3)(6a2b2
9、b3) (x2y3xy2)(5x2y9xy2) 9z25z2(3z29z)6(z25z) 206(1a)(1aa2)2(1aa2a3) (a2b9ab)(a2b3ab) (4y23y6)(4y24y1) (5n24n6)2(55n5n2) 一、计算。 x2y6x2y 100y29.5y2 1 1 a2bccba2 6a2b0.9a2b 2 3 1 1 xyxy10 6x3y20.5x3y2 3 4 ab2a2b266ab29a2b229ab 4x38x26y25yx23y4y2 (a2bb3)(4a2b25b3) (x2y7xy2)(x2y3xy2) 9z28z2(4z26z)6(z24z)
10、155(1a)(1aa2)3(1aa2a3) (3a2bab)(a2b4ab) (8y22y9)(7y22y1) (5a23a7)4(53a6a2) 一、计算。 7x2y8x2y 30z28.5z2 1 1 a2bccba2 a2b0.4a2b 5 2 1 1 stst5 5a2b22.5a2b2 6 4 ab3a2b222ab22a2b296ab 6x37x25y2y8x28yy2 (a2b7b3)(a2b2b3) (7x2y6xy2)(2x2y5xy2) 9n22n2(7n27n)2(n25n) 155(1a)(1aa2)3(1aa2a3) (a2b6ab)(a2bab) (3m23m5)
11、(8m24m4) (9m24m2)4(36m2m2) 一、计算。 2x2y8x2y 30n211.5n2 1 1 a2bccba2 a2b0.9a2b 4 4 1 1 abab10 5x2y1.5x2y 5 5 ab7a2b255ab29a2b235ab 5x39x2y2yx24yy2 (6a2bb3)(a2b29b3) (3x2yxy2)(x2yxy2) 9x26x2(4x24x)7(x29x) 39(1a)(1aa2)3(1aa2a3) (5a2bab)(a2bab) (7z23z9)(7z25z5) (8y26y3)4(44y7y2) 一、计算。 2x2y5x2y 100t24.5t2 1 1 a2bccba2 a2b0.9a2b 3 5 1 1 mnmn6 5a3b1.5a3b 6 4
