Ответ: (13 2/3 * 2 1/7 — 12 2/3 * 2 1/7) : 1 1/14 * 3 1/3 + 1/3 = 71) 13 2/3 * 2 1/7 — 12 2/3 * 2 1/7 = 2 1/7 * (13 2/3 — 12 2/3) = 2 1/7 * 1 = 2 1/72) 2 1/7 : 1 1/14 = 15/7 : 15/14 = 15/7 * 14/15 = 23) 2 * 3 1/3 = 2 * 10/3 = 20/3 = 6 2/34) 6 2/3 + 1/3 = 6 3/3 = 7