(5 целых1/6-3.25)×4/25
3,25 = 3 1/4 (5 1/6 - 3 1/4) * 4/25 = 23/75 1) 5 1/6 - 3 1/4 = 5 2/12 - 3 3/12 = 4 14/12 - 3 3/12 = 1 11/12 2) 1 11/12 * 4/25 = 23/12 * 4/25 = 23/75
Спасибо