Ответ:

2) 9 1/4 * 8 - 3 2/3 * 5 1/2 - 12 2/5 * 4 7/12 = 37/4 * 8 - 11/3 * 11/2 - 62/5 * 55/12 = (37 * 8)/4 - (11 * 11)/(3 * 2) - (62 * 55)/(5 * 12) = 37 * 2 - 121/6 - (62 * 11)/12 = 74 - 121/6 - (31 * 11)/6 = 74 - (121 + 341)/6 = 74 - 462/6 = 74 - 77 = -3

Ответ: -3