2,5+1-3

2. 5 + 1/3 - 3/6 = 2.5 + 1/3 - 1/2 = 2.5 + 2/6 - 3/6 = 2.5 - 1/6 = 2 1/2 - 1/6 = 2 3/6 - 1/6 = 2 2/6 = 2 1/3

Ответ: 2 1/3