人教版七年级数学上册整式的加减法专项练习题精选45.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45一、计算。 7x2y7x2y 30y215.5y2 1 1 a2bccba2 a2b0.8a2b 2 2 1 1 pqpq3 2x3y27.5x3y2 2 6 ab3a2b283ab24a2b282ab 7x34x25y27y6x2y4y2 (a2b2b3)(a2b27b3) (x2yxy2)(9x2y2xy2) 7n22n2(7n26n)5(n24n) 134(1a)(1aa2)5(1aa2a3) (8a2b4ab)(a2bab) (8m25m6)(4m23m4) (6z23z2)5(84z5z2) 一、计算。 x2y4x2y 50x23.5

2、x2 1 1 a2bccba2 a2b0.2a2b 2 6 1 1 xyxy10 3x2y22.5x2y2 5 2 ab7a2b216ab25a2b234ab 2x38x24y2yx22y6y2 (a2b6b3)(8a2b2b3) (8x2yxy2)(x2y5xy2) 2x22x2(3x28x)5(x22x) 142(1a)(1aa2)4(1aa2a3) (9a2bab)(2a2bab) (2t24t6)(7t26t6) (8y22y7)4(62y7y2) 一、计算。 x2y4x2y 50c22.5c2 1 1 a2bccba2 a2b0.8a2b 2 2 1 1 xyxy1 8a3b1.5a

3、3b 2 2 ab4a2b248ab27a2b297ab 7x38x27y2yx26yy2 (a2b9b3)(a2b2b3) (8x2y9xy2)(5x2y4xy2) 9a26a2(8a28a)7(a29a) 89(1a)(1aa2)2(1aa2a3) (a2b5ab)(7a2bab) (6b22b4)(5b26b9) (3b26b3)2(53b2b2) 一、计算。 x2y9x2y 20x27.5x2 1 1 a2bccba2 5a2b0.9a2b 3 4 1 1 stst1 4a2b22.5a2b2 3 5 ab3a2b278ab24a2b282ab 3x38x2y26yx26y7y2 (7

4、a2bb3)(8a2b22b3) (x2yxy2)(x2y5xy2) 9a23a2(4a29a)4(a29a) 74(1a)(1aa2)2(1aa2a3) (a2b9ab)(a2bab) (2m25m7)(9m24m1) (6z23z9)5(52z3z2) 一、计算。 x2y9x2y 70a23.5a2 1 1 a2bccba2 4a2b0.3a2b 6 6 1 1 xyxy8 2x3y24.5x3y2 5 6 3ab7a2b248ab27a2b293ab 7x39x27y2y2x25yy2 (a2b8b3)(6a2b2b3) (3x2yxy2)(x2yxy2) 7t26t2(8t26t)2(

5、t29t) 77(1a)(1aa2)4(1aa2a3) (3a2b5ab)(a2b7ab) (2z24z5)(9z23z5) (2m22m7)4(44m4m2) 一、计算。 x2y3x2y 90c217.5c2 1 1 a2bccba2 9a2b0.6a2b 3 2 1 1 xyxy6 3x2y5.5x2y 4 2 2ab8a2b283ab29a2b223ab 3x38x26y22y2x2y5y2 (a2b8b3)(a2b2b3) (4x2y4xy2)(x2yxy2) 7n26n2(4n27n)8(n23n) 189(1a)(1aa2)2(1aa2a3) (2a2b2ab)(a2bab) (5

6、m25m8)(8m23m9) (6b24b3)5(34b8b2) 一、计算。 x2y7x2y 20c27.5c2 1 1 a2bccba2 3a2b0.8a2b 2 5 1 1 mnmn4 4a3b5.5a3b 2 2 9ab8a2b227ab29a2b234ab 2x36x25y23y8x26y6y2 (9a2b7b3)(a2b28b3) (x2y9xy2)(6x2y4xy2) 3m25m2(7m28m)4(m28m) 188(1a)(1aa2)3(1aa2a3) (a2bab)(7a2bab) (5c23c6)(4c24c1) (5a23a7)3(33a4a2) 一、计算。 x2y4x2y

7、 90n216.5n2 1 1 a2bccba2 8a2b0.8a2b 6 5 1 1 stst9 5x2y6.5x2y 2 3 2ab3a2b254ab26a2b285ab 2x39x2y27y8x2yy2 (a2b7b3)(7a2b2b3) (x2y7xy2)(x2yxy2) 4m29m2(9m22m)2(m28m) 196(1a)(1aa2)4(1aa2a3) (a2b3ab)(a2b9ab) (9x26x2)(2x22x9) (3a23a6)4(25a8a2) 一、计算。 x2y2x2y 90s218.5s2 1 1 a2bccba2 4a2b0.5a2b 2 2 1 1 xyxy8

8、3x2y1.5x2y 2 2 8ab4a2b284ab27a2b252ab 4x32x2y23y4x26yy2 (2a2bb3)(8a2b2b3) (3x2yxy2)(9x2y5xy2) 4m28m2(6m27m)3(m27m) 157(1a)(1aa2)4(1aa2a3) (a2b8ab)(a2bab) (8c23c2)(2c23c3) (4n22n9)2(62n2n2) 一、计算。 8x2y3x2y 10n27.5n2 1 1 a2bccba2 2a2b0.9a2b 2 5 1 1 pqpq9 3ab27.5ab2 6 3 ab6a2b238ab28a2b225ab 7x32x2y29y7

9、x24y6y2 (6a2b9b3)(a2b23b3) (x2y6xy2)(2x2yxy2) 6a23a2(5a27a)2(a26a) 36(1a)(1aa2)2(1aa2a3) (a2b5ab)(a2b5ab) (8m23m8)(2m23m5) (9b22b5)3(75b7b2) 一、计算。 x2y2x2y 40n211.5n2 1 1 a2bccba2 a2b0.8a2b 5 6 1 1 mnmn5 3x2y1.5x2y 3 6 ab6a2b282ab26a2b277ab 5x35x26y27yx2yy2 (5a2bb3)(a2b29b3) (7x2yxy2)(x2y8xy2) 6b28b2

10、(7b25b)3(b27b) 55(1a)(1aa2)5(1aa2a3) (5a2b9ab)(a2b3ab) (6n26n7)(6n26n2) (6t23t1)4(92t3t2) 一、计算。 x2y2x2y 30c211.5c2 1 1 a2bccba2 a2b0.6a2b 6 6 1 1 xyxy3 2a2b25.5a2b2 5 5 8ab3a2b265ab29a2b292ab 7x35x2y2y4x23yy2 (a2bb3)(a2b27b3) (9x2y9xy2)(2x2yxy2) 7c27c2(2c23c)4(c25c) 148(1a)(1aa2)2(1aa2a3) (a2bab)(a2

11、bab) (2t25t5)(7t25t5) (2x24x1)3(86x7x2) 一、计算。 9x2y7x2y 100a217.5a2 1 1 a2bccba2 7a2b0.7a2b 2 3 1 1 stst8 10ab20.5ab2 6 4 8ab7a2b243ab24a2b248ab 3x36x2y2y8x29yy2 (9a2b5b3)(2a2b2b3) (x2y6xy2)(x2yxy2) 3c26c2(9c28c)5(c27c) 79(1a)(1aa2)4(1aa2a3) (8a2bab)(a2bab) (3n24n3)(2n22n6) (8b25b2)2(45b4b2) 一、计算。 3x2y8x2y 70t27.5t2 1 1 a2bccba2 a2b0.6a2b 4 5 1 1 abab2 7x2y8.5x2