а) 4/5
б)2/3
Пошаговое объяснение:
а) 55/48 : (11/16 + 3/32) - 14/15 * 5/7 = 55/48 : 25/32 - 2/3 = 55/48 * 32/25 - 2/3 = 22/15 - 2/3 = 22/15 - 10/15 = 12/15 = 4/5
б) 4/45 : (12/25 - 4/15) + 15/16 * 4/15 = 4/45 : (36/75 - 20/75) + 1/4 =
= 4/45 * 75/16 + 1/4 = 5/12 + 1/4 = 5/12 + 3/12 = 8/12 = 2/3
