ж) 7/11((3/7)+5/7) = 7/11 (8/7) = 56/77 = 8/11
з) (7/12 - 3/16 - 5/24) + (1/4) = (14/24 - 3/16 - 5/24) + (6/24) = (7/12 - 3/16 - 5/24) + (1/4) = (14/24 - 3/16 - 5/24) + (6/24) = (14/24 - 3/16 - 5/24) + (6/24) = (21/48 - 9/48 - 10/48) + (12/48) = 2/48 = 1/24.
ж) 7/11((3/7)+5/7) = 7/11 (8/7) = 56/77 = 8/11
з) (7/12 - 3/16 - 5/24) + (1/4) = (14/24 - 3/16 - 5/24) + (6/24) = (7/12 - 3/16 - 5/24) + (1/4) = (14/24 - 3/16 - 5/24) + (6/24) = (14/24 - 3/16 - 5/24) + (6/24) = (21/48 - 9/48 - 10/48) + (12/48) = 2/48 = 1/24.