(Знак=/,это дробь)
18-10 5/6 * 1 13/35 + 6 5/14

1) 10 5/6 * 1 13/35 = 65/6 * 48/35 = 104/7 = 14 6/72) 18 - 14 6/7 + 6 5/14 = 24 5/14 - 14 12/14 = 23 19/14 - 14 12/14 = 9 7/14 == 9 1/2 Ответ 9 1/2

10 5/6*1 13/35=65/6*48/35=104/7=14 6/718-14 6/7=3 1/73 1/7+6 5/14=3 2/14+6 5/14=9 7/14=9 1/2