甲 + 乙 + 丙 = 15.56，甲 + 乙 = 6.12，甲 + 丙 = 10.45，乙 = 15.56 - 10.45 = 5.11，甲 = 6.12 - 5.11 = 1.01，丙 = 10.45 - 1.01 = 9.44，甲数是 1.01，乙数是 5.11，丙数是 9.44，
