Автор - Madifka
(3 1/5 + 2 1/4) * 5 - 25 5/6 = 1 5/12
1) 3 1/5 + 2 1/4 = 3 4/20 + 2 5/20 = 5 9/20
2) 5 9/20 * 5 = 109/20 * 5 = 545/20 = 27 5/20 = 27 1/4
3) 27 1/4 - 25 5/6 = 27 6/24 - 25 20/24 = 26 30/24 - 25 20/24 = 1 10/24 = 1 5/12