1、9 29(20)17(20) 9 18 5 1 4 () (108)2(24) 4 6 5 4 1 7 ()108 313(4)3 3 6 6 6、合并同类项。9b(5b2) b(2b3q)(9qb) 6(6m8)2m 4(6x6)(2x6) 4(ab9a)(6a6b) 18(abc4a)2(9a2abc) 3(xy8z)(xy6z) 2(pqpr)(9pqpr) 7、解方程。5 x 1 x 0.5x0.64.76.9x 6 2 9 4 1 2x1x 7(x3)9(x5)18 9 3 1 4 (4x3)x3 2x8(10x)4 6 5 y1 y1 9 0.5x8(x2)25 4 5 1 2 (
2、52x)(5x2) 4(4x4)2 4 3 4 5, 4.5 ,0 , 6.4 , 7.5 ,5 ,-0.2 7 8, 4.9 ,9 ,0.16 (1)-12与-6 (2)-4.5与1.75 (3)|-4.6|与|-1.4| (4)与 (5)16与|-7| (6)|-30.8|与|-2.7| 2 3 7 7 5 12(13)18(13) 6 15 7 6 1 () (144)12(3) 8 7 4 9 6 3 224 620(3)3 9x(3x9) 3x(7x5c)(4cx) 5(6n10)9n 6(7b10)(2b1) 4(ab7a)(6a5b) 15(abc3a)7(6a6abc) 5(x
3、y2z)(xy7z) 8(pqpr)(2pqpr) x 0.7x0.76.61.2x 9 4 9 2x3x 3(x4)4(x1)14 3 7 (9x7)x1 4x8(1x)3 2 5 y2 y3 2 2.5x2(x5)10 3 6 (42x)(4x5) 2(3x9)2 8 3 3 1, 4 ,0 ,8 , 16.5 ,-15 ,6.6 6, 1.5 ,-2 ,0.72 (1)-11与-7 (2)-3.25与-1.5 (3)|-6.2|与|1.3| (4)与 (5)12与|-4| (6)|-99|与|-0.5| 9 5 7 1 9 28(4)22(4) 3 12 5 1 3 ()16(9) 6
4、6 4 1 3 1 ()48 59(5)3 3 4 4 7n(4n6) n(3n9d)(8dn) 4(3s3)6s 3(8x3)(6x6) 7(ab8a)(5a2b) 12(abc2a)7(4a7abc) 6(xy3z)(xy8z) 8(pqpr)(7pqpr) 7 x 1 x 0.4x0.60.81.8x 9 8 9 8 1 3x9x 2(x5)7(x1)18 9 2 (3x2)x9 8x8(5x)4 y2 y2 9 2x6(x7)25 3 5 (12x)(3x3) 3(4x2)15 8 9 5, 0.5 ,0 , 0.8 , 0.5 ,-1 ,4 2 2, 0.3 ,4 , 0.56 (1
5、)-15与4 (2)-4与-2 (3)|-9|与|3.8| (4)与 (5)-8与|-8| (6)|-85.4|与|-8.5| 5 5 5 7 7 26(5)17(5) 9 12 1 2 1 (174)18(27) 8 3 4 1 1 7 ()128 810(2)2 4 4 8 4b(2b7) b(5b4d)(8d3b) 3(2b10)6b 8(6x3)(8x3) 3(ab4a)(8a6b) 13(abc7a)2(2a7abc) 4(xy6z)(xy2z) 5(pqpr)(5pqpr) x 0.3x0.98.96.8x 3 2 3 3x4x 5(x7)4(x7)20 7 6 1 1 (5x3)
6、x8 6x6(10x)2 8 5 y1 y1 7 1x5.5(x1)50 2 6 (34x)(4x2) 3(3x3)8 5 7 3, 1 ,0 , 4.8 , 23.5 ,-20 ,9.3 4, 4.65 ,3 ,0.8 (1)-18与-5 (2)-5与0.5 (3)|-9.6|与|-2.5| (4)与 (5)15与|-3| (6)|-93.2|与|-5.7| 8 7 5 11 5 3(2)24(2) 8 6 6 (120)14(15) 7 7 7 1 4 5 ()150 811(4)3 5 5 6 2x(2x7) 3x(9x4s)(9sx) 2(2t5)4t 8(4y10)(6y4) 3(ab7a)(5a9b) 14(abc2a)3(3a9abc) 8(xy6z)(xy9z) 9(pqpr)(2pqpr) x 0.3x0.78.72.1x 3x6x 7(x6)5(x1)5 (3x6)x3 2x7(13x)1 y3 y2 1 3.5x2(x9)45 (53x)(2x3) 4(5x3)2
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