人教版七年级数学上册整式的加减法专项练习题精选47.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47一、计算。 2x2y8x2y 30s24.5s2 1 1 a2bccba2 3a2b0.6a2b 5 3 1 1 stst5 6ab22.5ab2 2 5 ab2a2b246ab22a2b249ab 9x33x28y24yx28y6y2 (a2bb3)(6a2b27b3) (x2y5xy2)(x2yxy2) 3a27a2(9a23a)7(a26a) 67(1a)(1aa2)5(1aa2a3) (a2b4ab)(8a2b4ab) (7s25s4)(9s23s8) (4n22n4)2(86n4n2) 一、计算。 x2y7x2y 10c25.5c2

2、1 1 a2bccba2 a2b0.7a2b 5 3 1 1 stst4 6a3b7.5a3b 2 5 5ab6a2b223ab28a2b229ab 9x37x2y2yx29yy2 (4a2b3b3)(a2b23b3) (8x2y5xy2)(x2yxy2) 7c25c2(6c26c)9(c25c) 182(1a)(1aa2)4(1aa2a3) (a2b7ab)(a2bab) (8s24s8)(9s26s1) (5z23z3)2(63z2z2) 一、计算。 5x2y5x2y 80n28.5n2 1 1 a2bccba2 a2b0.9a2b 4 3 1 1 pqpq2 10ab22.5ab2 2

3、5 ab8a2b274ab26a2b285ab 3x33x2y2yx2y6y2 (a2bb3)(9a2b23b3) (5x2yxy2)(x2yxy2) 2t26t2(3t29t)7(t24t) 145(1a)(1aa2)5(1aa2a3) (a2b7ab)(a2bab) (5t24t5)(5t26t4) (4a26a3)3(25a8a2) 一、计算。 3x2y6x2y 50m216.5m2 1 1 a2bccba2 7a2b0.5a2b 2 5 1 1 xyxy9 4ab27.5ab2 4 6 7ab4a2b287ab27a2b293ab 6x32x23y2y3x2y9y2 (a2bb3)(a

4、2b2b3) (x2y3xy2)(5x2yxy2) 8t27t2(5t26t)7(t29t) 116(1a)(1aa2)5(1aa2a3) (a2b6ab)(a2bab) (6a26a9)(5a24a7) (8m24m5)4(42m4m2) 一、计算。 x2y6x2y 60s23.5s2 1 1 a2bccba2 a2b0.6a2b 4 6 1 1 xyxy6 5a2b26.5a2b2 5 2 ab4a2b292ab26a2b263ab 9x36x2y2y4x2y8y2 (a2bb3)(6a2b26b3) (9x2yxy2)(2x2yxy2) 8a24a2(9a22a)4(a23a) 54(1

5、a)(1aa2)5(1aa2a3) (a2b2ab)(9a2bab) (3t23t4)(7t24t1) (3y23y6)3(92y3y2) 一、计算。 x2y8x2y 50b26.5b2 1 1 a2bccba2 4a2b0.4a2b 3 2 1 1 pqpq4 5x2y20.5x2y2 4 2 ab4a2b213ab28a2b294ab 2x38x24y23y2x28y6y2 (7a2bb3)(3a2b22b3) (6x2y8xy2)(x2y4xy2) 7y23y2(8y29y)4(y28y) 82(1a)(1aa2)4(1aa2a3) (a2b3ab)(2a2bab) (8b26b3)(3

6、b24b8) (7c25c6)4(25c8c2) 一、计算。 4x2y2x2y 90m213.5m2 1 1 a2bccba2 7a2b0.6a2b 5 6 1 1 stst6 3a2b22.5a2b2 4 6 3ab4a2b219ab24a2b265ab 8x32x27y2yx2yy2 (6a2bb3)(3a2b2b3) (9x2y2xy2)(x2y2xy2) 7x28x2(9x23x)9(x25x) 125(1a)(1aa2)3(1aa2a3) (7a2b5ab)(a2bab) (6c23c3)(2c26c5) (3z25z2)4(82z5z2) 一、计算。 x2y7x2y 20x21.5

7、x2 1 1 a2bccba2 a2b0.4a2b 3 4 1 1 mnmn3 9ab22.5ab2 6 4 ab7a2b236ab25a2b267ab 2x37x23y2yx2yy2 (4a2bb3)(7a2b26b3) (2x2y7xy2)(9x2yxy2) 5y24y2(7y26y)6(y24y) 205(1a)(1aa2)3(1aa2a3) (a2b2ab)(5a2bab) (5n26n2)(9n24n6) (8z25z7)5(63z6z2) 一、计算。 x2y8x2y 30m29.5m2 1 1 a2bccba2 6a2b0.6a2b 3 6 1 1 xyxy2 8x2y26.5x2

8、y2 4 2 ab4a2b265ab22a2b273ab 3x38x26y24yx25y2y2 (a2bb3)(3a2b2b3) (x2y2xy2)(6x2y4xy2) 7s29s2(3s29s)6(s29s) 189(1a)(1aa2)3(1aa2a3) (8a2bab)(5a2bab) (4t22t1)(8t23t9) (3x26x2)3(85x5x2) 一、计算。 8x2y4x2y 20b29.5b2 1 1 a2bccba2 5a2b0.4a2b 4 5 1 1 mnmn6 9ab28.5ab2 4 2 ab5a2b299ab24a2b217ab 3x37x2y2y9x2y9y2 (a

9、2b3b3)(3a2b23b3) (7x2y2xy2)(x2yxy2) 3m29m2(3m23m)7(m25m) 196(1a)(1aa2)5(1aa2a3) (a2b4ab)(2a2bab) (3z26z5)(5z26z3) (3c26c8)2(53c2c2) 一、计算。 8x2y4x2y 50m29.5m2 1 1 a2bccba2 a2b0.9a2b 2 6 1 1 xyxy8 2x3y28.5x3y2 3 3 5ab4a2b256ab29a2b296ab 9x34x25y27y7x28yy2 (6a2bb3)(a2b27b3) (5x2yxy2)(5x2yxy2) 4x27x2(3x2

10、4x)3(x29x) 199(1a)(1aa2)2(1aa2a3) (a2b5ab)(8a2b8ab) (7x25x7)(3x22x9) (6z22z1)5(46z4z2) 一、计算。 3x2y3x2y 60n21.5n2 1 1 a2bccba2 5a2b0.3a2b 4 2 1 1 pqpq4 7x2y27.5x2y2 4 4 ab7a2b276ab28a2b255ab 3x33x22y24yx2y7y2 (3a2b7b3)(7a2b2b3) (7x2yxy2)(5x2y8xy2) 9y25y2(2y25y)6(y29y) 123(1a)(1aa2)5(1aa2a3) (7a2b4ab)(

11、a2bab) (5b22b9)(9b22b1) (2n22n2)2(36n3n2) 一、计算。 x2y9x2y 80a218.5a2 1 1 a2bccba2 9a2b0.8a2b 3 6 1 1 stst5 9x2y24.5x2y2 6 6 ab5a2b233ab28a2b299ab 7x32x28y27yx2yy2 (a2bb3)(9a2b2b3) (x2yxy2)(7x2yxy2) 6x28x2(7x27x)8(x26x) 154(1a)(1aa2)4(1aa2a3) (8a2b5ab)(a2bab) (6t26t5)(4t24t3) (3a24a3)5(36a4a2) 一、计算。 4x2y7x2y 10z216.5z2 1 1 a2bccba2 a2b0.5a2b 3 2 1 1 abab8 3x2y25.5x2y2 5 4