Выполните действия: 1) 7 7/9 - 4 1/12 + 2 3/4; 2) 17 2/3 - 6 1/36 +4 3/8; 3) 10 9/16 - (3 11/12 + 4 4/9); 4) (20 - 7

1. 1) 7 7/9 - 4 1/12 = 7 (4 * 7)/36 - 4 (3 * 1)/36 = 7 28/36 - 4 3/36 = 3 25/36;2) 3 25/36 + 2 3/4 = 3 25/36 + 2 (9 * 3)/36 = 3 25/36 + 2 27/36 = 5 52/36 = 6 16/36 = 6 4/9.Ответ: 6 4/9.2. 1) 17 2/3 - 6 1/36 = 17 (12 * 2)/36 - 6 1/36 = 17 24/36 - 6 1/36 = 11 23/36;2) 11 23/36 + 4 3/8 = 11 (2 * 23)/72 + 4 (9 * 3)72 = 11 46/72 + 4 27/72 = 15 73/72 = 16 1/72.Ответ: 16 1/72.3. 1) 3 11/12 + 4 4/9 = 3 (3 * 11)/36 + 4 (4 * 4)/36 = 3 33/36 + 4 16/36 = 7 49/36 = 8 13/36;2) 10 9/16 - 8 13/36 = 10 (9 * 9)/144 - 8 (4 * 13)/144 = 10 81/144 - 8 52/144 = 2 29/144.Ответ: 2 29/144.4. 1) 20 - 7 23/36 = 19 36/36 - 7 23/36 = 12 13/36;2) 14 4/27 - 6 1/18 = 14 (2 * 4)/54 - 6 (3 * 1)/54 = 14 8/54 - 6 3/54 = 8 5/54;3) 12 13/36 - 8 5/54 = 12 (3 * 13)/108 - 8 (2 * 5)/108 = 12 39/108 - 8 10/108 = 4 29/108.Ответ: 4 29/108.