9 - 7/15 11 цел 5/12 - 7 13 - 7 цел 3/8 5 цел 3/4 - 3 цел 5/7 6 цел 3/5 -4 цел 5/7 25 цел 8/19 + 36 цел 11/19 2 цел 7/12 + 4 цел 13/18 2 цел 3/8 + 6 цел 5/12 + 4 цел 5/14 7 цел 5/18 + 3 цел 8/27 - 6 цел 7/9 решите пожалуйста , ...

9 - 7/15 = 8 15/15 - 7/15 = 8 8/1511 5/12 - 7 = 4 5/1213 - 7 3/8 = 12 8/8 - 7 3/8 = 5 5/85 3/4 - 3 5/7 = 5 21/28 - 3 20/28 = 2 1/286 3/5 - 4 5/7 = 6 21/35 - 4 25/35 = 5 56/35 - 4 25/35 = 1 31/3525 8/19 + 36 11/19 = 61 19/19 = 622 7/12 + 4 13/18 = 2 21/36 + 4 26/36 = 6 47/36 = 7 11/362 3/8 + 6 5/12 + 4 5/14 = 2 63/168 + 6 70/168 + 4 60/168 = 12 193/168 = 13 25/1687 5/18 + 3 8/27 - 6 7/9 = 7 15/54 + 3 16/54 - 6 42/54 = (7 + 3 - 6) + (15/54 + 16/54 - 42/54) = 4 + (31/54 - 42/54) = 4 - 11/54 = 3 43/54