1、5、计算。 5 1 8 27(13)26(13) 6 15 5 1 7 () (66)4(18) 6 3 6 1 7 5 ()240 67(2)3 5 8 6 6、合并同类项。8n(2n1) n(6n8q)(8qn) 9(7b10)2b 9(2b7)(2b5) 6(ab7a)(9a4b) 5(abc9a)3(4a8abc) 3(xy2z)(xy9z) 8(pqpr)(8pqpr) 7、解方程。5 x 1 x 0.8x0.49.64.2x 9 2 6 4 1 2x6x 5(x4)3(x7)7 3 7 1 4 (6x7)x3 3x2(16x)6 9 5 y3 y2 3 3.5x9(x2)10 2
2、5 1 2 (32x)(5x4) 6(3x3)6 8 3 3, 3.5 ,0 , 1.6 , 11.5 ,6 ,0.2 2 4, 4.45 ,9 , 0.48 7 (1)10与2 (2)2.75与0.5 (3)|7.7|与|0.4| (4)与 (5)17与|10| (6)|16.9|与|2.8| 6 5 7 7 5 15(18)4 9 15 3 1 1 () (156)18(12) 4 5 4 192 310(3)2 6 8 4 2b(2b4) b(7b4s)(4sb) 6(3a10)3a 8(6b4)(4b1) 2(ab9a)(7a2b) 4(abc6a)6(4a7abc) 8(xy4z)(
3、xy7z) 2(pqpr)(2pqpr) 7 x 1 x 0.6x0.37.98.9x 9 8 6 7x2x 8(x8)7(x3)11 1 1 (4x3)x5 2x5(14x)7 2 5 y2 y3 9 4x3.5(x1)25 4 6 (52x)(2x2) 4(9x7)10 7 5 1, 2 ,0 ,6.4 , 22 ,13 ,6.1 6 5, 2.9 ,9 ,0.48 (1)12与1 (2)4.5与1 (3)|9.7|与|2.4| (4)与 (5)16与|8| (6)|80|与|2.4| 4 9 1 1 8 7(15)16(15) 3 18 7 3 1 (90)18(6) 8 4 4 1 1
4、 1 ()128 410(4)3 4 4 8 8m(6m5) 4m(2m4d)(8d3m) 9(5a8)8a 9(4n10)(2n1) 3(ab6a)(2a4b) 10(abc5a)3(2a9abc) 7(xy2z)(xy8z) 3(pqpr)(5pqpr) x 0.5x0.686.8x 9 4 3 4x3x 3(x3)8(x2)16 9 7 (9x9)x5 5x6(5x)9 8 5 y1 y3 3 4x1(x5)10 (54x)(5x3) 4(7x8)11 4 3 5, 3 ,0 ,4 , 13 ,17 ,1.3 8 8, 2.25 ,6 , 0.16 (1)13与7 (2)4与0.75 (
5、3)|6.6|与|3.6| (4)与 (5)18与|4| (6)|26.3|与|8.7| 9 9 2 6(11)17(11) 3 15 6 1 7 (126)(27) 5 6 8 2 4 7 120 33(1)3 3 5 8 9a(3a8) 3a(8a3c)(5c4a) 5(8a8)7a 3(9m10)(2m6) 6(ab9a)(2a6b) 15(abc9a)2(6a7abc) 2(xy9z)(xy8z) 2(pqpr)(3pqpr) x 0.4x0.38.77.8x 6 2 6 8x7x 3(x1)6(x4)6 9 8 (5x6)x6 4x7(7x)5 5 5 y1 y1 2 4.5x3(x7)15 (23x)(2x5) 9(7x7)5 2 7 4, 1 ,0 , 5.6 , 9 ,16 ,0.5 7, 1.85 ,0 ,0.32 (1)13与10 (2)2.75与2.5 (3)|6.4|与|0.9| (4)与 (5)19与|5| (6)|68.4|与|5.3| 3 3 7 1 6 1(3)9(3) 9 12 7 1 1 () (102)(9) 8 8 3 1 4 8 280 810(2)3 8 5 7 7y(6y6) 6y(9y2d)(6dy) 4(3s7)8s 9(3n9)(8n6) 4(ab2a)(7
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