вычислите а)9+ 2 3\8 б) 2 3\8 -9 в)-2 3\8+9 г)9-2 3\8 д)-2 3\8-9 е)-9+2 3\8

а) 9 + 2 3/8 = 11 3/8б) 2 3/8 - 9 = 19/8 - 9/1 = (19-72)/8 = -53/8 = -6 5/8в) -2 3/8 + 9 = 9 - 2 3/8 = 7 - 3/8 = 6 + (8/8 - 3/8) = 6 5/8г) 9 - 2 3/8 = 7 - 3/8 = 6 + (8/8 - 3/8) = 6 5/8д) - 2 3/8 - 9 = -11 3/8е) - 9 + 2 3/8 = -7 + 3/8 = -6 5/8