Петр3 года назад
2(1/2) – (3/8) = (5/2) – (3/8) = (20/8) – (3/8) = 17/8 = 2(1/8).
(54/2) – (7/18) = (218/8) – (7/8) = 211/8 = 26(3/8).
(11/3) + (1/7) = (77/21) + (3/21) = 80/21 = 3(17/21).
22(3/8) + (5/16) = (179/8) + (5/16) = (358/16) + (5/16) = 363/16 = 22(11/16).