А) - 5/8 - (- 7/12) = - 5/8 + 7/12 = - 15/24 + 14/24 = - 1/24; б) 38 - (- 16) = 38 + 16 = 54; в) - 7 7/24 - 4 13/16 = - 7 14/48 - 4 39/48 = - 11 53/48 = - 12 5/48; г) 5/9 - 2 = 5/9 - 18/9 = - 13/9 = - 1 4/9; д) - 18,9 - 36, 4 = - 55,3; е) - 3 3/14 - (- 2 5/6) = - 3 3/14 + 2 5/6 = - 3 6/24 + 2 20/24 = - 2 30/24 + 2 20/24 = 10/24 = 5/12.