Пошаговое объяснение:
1) 1. 2/3 * 3 = 5/3 * 3 = 15/3 = 5
2) 3. 1/3 + 5 = 8. 1/3
3) 8. 1/3 - 5/6 = 8. 2/6 - 5/6 = 7. 8/6 - 5/6 = 7. 3/6 = 7. 1/2
