1、4 29(5)24(5) 6 12 3 6 9 () (84)10(9) 4 7 8 6 7 4 ()168 310(2)3 7 8 3 6、合并同类项。7m(7m4) 9m(7m5c)(6c2m) 9(6n9)8n 3(2y8)(6y6) 9(ab5a)(3a8b) 2(abc4a)8(6a4abc) 4(xy7z)(xy6z) 2(pqpr)(3pqpr) 7、解方程。5 x 1 x 0.8x0.61.15.1x 9 6 6 4 1 8x4x 3(x7)3(x7)16 3 8 1 1 (8x6)x9 2x5(11x)6 3 5 y2 y3 4 3x3.5(x2)50 4 5 1 2 (44
2、x)(5x4) 9(3x8)11 9 5 4 1, 1.5 ,0 ,0.8 , 11.5 ,20 ,2.3 8, 1.5 ,6 ,0.72 (1)-18与2 (2)-4与-0.75 (3)|-7.4|与|1.5| (4)与 (5)-19与|-3| (6)|-77.5|与|-2.7| 8 9 5 11 3 9(13)7(13) 3 12 9 6 9 () (102)14(24) 8 7 8 1 1 1 147 86(1)3 7 7 3 7b(7b9) b(2b6q)(7qb) 4(7n1)5n 5(5a7)(8a2) 7(ab2a)(2a5b) 20(abc8a)4(2a8abc) 2(xy3z
3、)(xy6z) 6(pqpr)(3pqpr) 7 x 1 x 0.8x0.672.2x 3 8 9 2 1 6x7x 2(x1)2(x2)6 1 3 (9x6)x1 2x8(9x)2 8 5 y1 y1 7 1.5x3(x9)25 2 6 (42x)(5x4) 8(7x8)12 6 5 5, 5 ,0 , 6.4 , 1 ,-17 ,-1.5 6 2 7, 2.5 ,2 , 0.08 (1)-20与7 (2)-4.25与0.5 (3)|-4.4|与|0.6| (4)与 (5)-16与|-8| (6)|-1.5|与|-8.3| 6 7 5 13 7 13(7)15(7) 3 15 9 1 4 (
4、) (126)12(12) 8 6 3 7 8 8 ()392 27(2)2 8 7 7 9y(5y8) 4y(7y7d)(3dy) 4(5t5)3t 4(9n6)(6n7) 7(ab9a)(4a4b) 13(abc3a)4(8a9abc) 5(xy8z)(xy2z) 9(pqpr)(9pqpr) x 0.8x0.12.59.3x 8 1 9x7x 2(x6)7(x2)11 7 4 (6x7)x8 9x4(13x)3 y2 y1 8 2.5x0.5(x4)35 4 6 (32x)(5x5) 9(6x3)8 3 9 5, 4 ,0 ,5.6 , 12.5 ,-1 ,-6.1 1, 2.7 ,-6
5、 , 0.8 9 (1)-17与6 (2)-5与1.75 (3)|-9.3|与|-3.7| (4)与 (5)8与|-8| (6)|-25.6|与|-3.1| 5 5 8 1(19)4(19) 9 15 1 5 7 () (78)16 5 4 6 5 7 4 240 31(3)2 6 8 5 2a(6a5) a(4a2p)(9p7a) 9(5b10)8b 9(8y6)(4y10) 2(ab8a)(6a2b) 9(abc3a)4(8a4abc) 5(xy5z)(xy2z) 5(pqpr)(7pqpr) x 0.9x0.99.51.4x 9 2 6 5x5x 3(x3)5(x2)4 9 8 1 4 (4x2)x7 6x5(13x)6 2 5 y1 y3 9 5x9(x2)5 (53x)(5x2) 7(9x2)8 5 5 3, 1.5 ,0 , 7.2 , 4 ,-20 ,4.3 7, 1.6 ,0 , 0.64 (1)-15与3 (2)-4.5与2.5 (3)|-5.5|与|-1.8| (4)与 (5)-5与|-7| (6)|-10.6|与|-5.2| 5 9 7 7 2 16(4)26(4) 3 18 6 6 1 (114)16(3) 5 5 4 7 7 7 288 119(4)3 6 6 8 5x(2x1) x(3x7z)(7zx) 3(8t3)2t 6(3x10)(6x6) 2(
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