Пошаговое объяснение:

5 1/3 * 9 - 2 3/4 * 5 1/3 - 19 1/2 * 1 5/9 =

5 1/3 * (9 - 2 3/4) - 19 1/2 * 1 5/9 =

5 1/3 * (8 4/4 - 2 3/4) - 19 1/2 * 1 5/9 =

5 1/3 * 6 1/3 - 19 1/2 * 1 5/9 =

16/3 * 19/3 - 39/2 * 14/9 =

304/9 - 546/18 = 608/18 - 546/18 =

62/18 = 31/9 = 3 4/9