Ответ:
7 7/24
Пошаговое объяснение:
1) 1 1/12 + 1 1/4 = 1 1/12 + 1 3/12 = 2 4/12 = 2 1/3
2) 2 1/3 * 1 19/56 = 7/3 * 75/56 = 25/8
3) 2 5/8 * 1 3/7 = 21/8 * 10/7 = 15/4
4) 15/4 * 1 1/9 = 15/4 * 10/9 = 25/6
5) 25/8 + 25/6 = 75/24 + 100/24 = 175/24 = 7 7/24