Ответ:

Пошаговое объяснение:

б) = (11/60 + 19/60)+(9/28+5/28) = 30/60 + 14/28 = 1/2 + 1/2 = 2/2 = 1

г) = (19/36 - 1/36) + 5/8 = 18/36 + 5/8 = 1/2 + 5/8 = 4/8 + 5/8 = 9/8 = 1 1/8

e) = (14/39 - 1/39) - 1/12 = 13/39 - 1/12 = 1/3 - 1/12 = 4/12 - 1/12 = 3/12 = 1/4

д) = (35/68 - 1/68) - 7/22 = 34/68 - 7/22 = 1/2 - 7/22 = 11/22 - 7/22 = 4/22 = 2/11