Ответ:

  1. а) 38 1/8 + 4 5/24 = 42 + 3/24 + 5/24 = 42 1/3.
  2. б) 4 19/75 + 6 17/45 = 10 + 57/225 + 85/225 = 10 142/225.
  3. в) 47 3/14 + 1 1/8 = 48 + 12/56 + 7/56 = 48 19/56.
  4. г) 54 3/4 + 18 5/6 = 72 + 9/12 + 10/12 = 73 7/12.
  5. д) 28 5/9 + 13 3/4 = 41 + 20/36 + 27/36 = 42 11/36.
  6. е) 4/7 + 2 3/5 = 2 + 20/35 + 21/35 = 3 6/35.
  7. ж) 9 + 2 2/9 = 11 2/9.