1、人教版七年级数学上册整式的加减法练习题精选28一、计算。 x2y3x2y 50n28.5n2 1 1 a2bccba2 8a2b0.5a2b 6 3 1 1 abab5 8a2b22.5a2b2 3 5 2ab3a2b288ab24a2b294ab 7x38x2y2y4x2y3y2 (3a2b9b3)(a2b2b3) (x2y2xy2)(x2yxy2) 3y29y2(9y22y)7(y29y) 178(1a)(1aa2)5(1aa2a3) (a2bab)(2a2b4ab) (9a24a6)(9a25a9) (3x25x4)2(65x5x2) 一、计算。 5x2y6x2y 80n23.5n2 1
2、 1 a2bccba2 a2b0.9a2b 6 4 1 1 abab3 4ab25.5ab2 3 3 6ab4a2b246ab25a2b279ab 6x37x2y27y7x2y8y2 (a2b2b3)(3a2b25b3) (3x2yxy2)(x2y2xy2) 9c29c2(4c24c)9(c28c) 183(1a)(1aa2)5(1aa2a3) (a2bab)(8a2bab) (6z23z9)(6z26z9) (6a25a7)4(42a7a2) 一、计算。 x2y6x2y 30s213.5s2 1 1 a2bccba2 a2b0.8a2b 5 2 1 1 mnmn10 2a2b27.5a2b2
3、 3 6 ab4a2b255ab25a2b249ab 7x35x2y2yx24y4y2 (7a2b9b3)(a2b23b3) (2x2y9xy2)(x2y3xy2) 7t25t2(3t27t)9(t24t) 53(1a)(1aa2)5(1aa2a3) (4a2bab)(4a2bab) (3y23y7)(9y23y7) (5a23a8)3(66a9a2) 一、计算。 x2y8x2y 100m211.5m2 1 1 a2bccba2 9a2b0.8a2b 3 5 1 1 abab3 6ab23.5ab2 4 3 9ab4a2b233ab25a2b247ab 7x32x2y2y4x2yy2 (a2b
4、b3)(a2b26b3) (x2y5xy2)(6x2y4xy2) 2a29a2(2a23a)6(a25a) 77(1a)(1aa2)5(1aa2a3) (a2b3ab)(2a2bab) (5t26t8)(9t23t6) (8y22y4)3(74y9y2) 一、计算。 x2y9x2y 100y26.5y2 1 1 a2bccba2 a2b0.5a2b 3 2 1 1 pqpq10 2x3y24.5x3y2 3 2 7ab6a2b235ab22a2b212ab 4x39x2y24y4x2yy2 (a2b9b3)(8a2b27b3) (x2yxy2)(7x2y9xy2) 2b26b2(4b26b)4
5、(b22b) 182(1a)(1aa2)4(1aa2a3) (9a2bab)(a2b5ab) (4a23a5)(4a22a9) (6t26t7)4(24t8t2) 一、计算。 x2y7x2y 70n210.5n2 1 1 a2bccba2 6a2b0.2a2b 5 4 1 1 pqpq1 9ab27.5ab2 2 3 ab3a2b292ab26a2b286ab 9x32x25y2yx2y9y2 (a2b5b3)(a2b2b3) (4x2yxy2)(x2y8xy2) 8s22s2(7s23s)6(s29s) 52(1a)(1aa2)3(1aa2a3) (7a2bab)(2a2bab) (3y25
6、y5)(8y23y7) (6s25s3)3(82s5s2) 一、计算。 x2y4x2y 90m212.5m2 1 1 a2bccba2 7a2b0.6a2b 2 6 1 1 abab1 6x2y2.5x2y 4 4 ab8a2b225ab24a2b212ab 4x37x27y2yx22yy2 (a2bb3)(2a2b25b3) (x2y5xy2)(x2yxy2) 2s28s2(3s23s)4(s22s) 114(1a)(1aa2)2(1aa2a3) (8a2bab)(3a2b6ab) (6t23t8)(8t26t8) (2c22c4)4(73c3c2) 一、计算。 x2y2x2y 40x24.
7、5x2 1 1 a2bccba2 a2b0.4a2b 4 6 1 1 abab2 7a3b1.5a3b 5 2 3ab6a2b299ab22a2b222ab 8x33x29y29yx25y2y2 (a2bb3)(7a2b27b3) (6x2yxy2)(x2y2xy2) 9m24m2(6m24m)2(m23m) 76(1a)(1aa2)5(1aa2a3) (7a2b2ab)(a2b5ab) (5c22c8)(7c26c1) (9n24n8)2(52n8n2) 一、计算。 x2y4x2y 100a211.5a2 1 1 a2bccba2 a2b0.5a2b 4 6 1 1 xyxy1 6x3y22
8、.5x3y2 5 2 ab3a2b235ab27a2b272ab 7x32x29y26y5x25yy2 (a2b7b3)(a2b2b3) (8x2y7xy2)(x2yxy2) 5z29z2(3z22z)3(z26z) 35(1a)(1aa2)3(1aa2a3) (6a2b8ab)(a2b9ab) (8c25c7)(8c26c9) (5y23y5)3(23y5y2) 一、计算。 7x2y4x2y 100z23.5z2 1 1 a2bccba2 5a2b0.7a2b 4 3 1 1 mnmn1 5x2y25.5x2y2 6 5 ab2a2b292ab24a2b232ab 4x35x22y2y3x2
9、y8y2 (7a2bb3)(a2b27b3) (x2y2xy2)(x2y8xy2) 8m26m2(2m28m)7(m23m) 67(1a)(1aa2)4(1aa2a3) (a2b7ab)(a2b7ab) (9s26s7)(7s25s8) (8n23n6)3(65n8n2) 一、计算。 7x2y4x2y 70t213.5t2 1 1 a2bccba2 a2b0.3a2b 3 5 1 1 abab3 6ab29.5ab2 2 5 3ab8a2b296ab22a2b274ab 6x33x2y29y5x2y5y2 (2a2bb3)(7a2b22b3) (x2yxy2)(2x2y7xy2) 6n29n2
10、(6n29n)6(n27n) 126(1a)(1aa2)5(1aa2a3) (6a2b7ab)(a2b5ab) (8x22x7)(6x22x1) (2a23a5)5(55a8a2) 一、计算。 5x2y8x2y 100s214.5s2 1 1 a2bccba2 a2b0.5a2b 3 4 1 1 mnmn6 10x3y26.5x3y2 2 6 ab4a2b245ab28a2b223ab 3x32x2y24y4x26yy2 (a2b6b3)(8a2b2b3) (x2yxy2)(x2y3xy2) 6x29x2(8x24x)2(x24x) 153(1a)(1aa2)5(1aa2a3) (4a2b2a
11、b)(a2b7ab) (8b24b9)(2b26b2) (5z26z1)3(43z4z2) 一、计算。 x2y3x2y 100m27.5m2 1 1 a2bccba2 a2b0.4a2b 6 2 1 1 xyxy6 7ab25.5ab2 4 5 ab6a2b228ab27a2b248ab 2x37x22y27yx2y6y2 (2a2bb3)(a2b26b3) (x2yxy2)(x2y8xy2) 2x26x2(2x26x)5(x24x) 205(1a)(1aa2)5(1aa2a3) (a2bab)(a2b2ab) (3n25n4)(6n22n3) (5s23s1)5(95s9s2) 一、计算。 x2y5x2y 100t219.5t2 1 1 a2bccba2 a2b0.2a2b 5 2 1 1 abab7 9ab26
