(+8 2/3)+(+11 1/3)+(-3,6)
(+8 2/3) + (+11 1/3) + (-3,6) = (8 2/3 + 11 1/3) - 3,6 = 19 3/3 - 3,6 = 20 - 3,6 = 16,4 Ответ: 16,4.