Ответ:

-8/30 + 15/60 = - 1/60

Ответ - 1/60

8/15 * (-1/2) - 3/10 : (-6/5) = -1/60

1) 8/15 * (-1/2) = -8/30 = -4/15

2) 3/10 : (-6/5) = 3/10 * (-5/6) = -15/60 = -1/4

3) -4/15 - (-1/4) = -4/15 + 1/4 = 1/4 - 4/15 = 15/60 - 16/60 = -1/60

Ответ: -1/60