6 – 8 + 3 — 11 — 9 = 9 - 28 = -19
6 - 8 + 3 - 11 - 9 = -(8 + 11 + 9) + 6 + 3 = -28 + 9 =
= 9 - 28 = - 19
6 – 8 + 3 — 11 — 9 = 9 - 28 = -19
6 - 8 + 3 - 11 - 9 = -(8 + 11 + 9) + 6 + 3 = -28 + 9 =
= 9 - 28 = - 19