Ответ:а) 3 1/3 + 2 2/5 = 5 + 5/15 + 6/15 = 5 11/15.б) 4 5/6 + 5 3/4 = 9 + 10/12 + 9/12 = 10 7/12 + 9/12 = 10 7/12. (Сумма дробных частей 19/12 = 1 7/12.)в) 1 1/24 + 5 5/8 = 6 + 1/24 + 15/24 = 6 2/3.г) 3 2/9 + 1 5/12 = 4 + 8/36 + 15/36 = 4 23/36.