8/15 * (-1/2) - 3/10 : (-6/5) =
= -4/15 - 3/10 * (-5/6) =
= -4/15 + 1/4 =
= -(4*4)/(15*4) + (1*15)/(4*15) =
= -16/60 + 15/60 =
= -1/60
ответ: -1/60
8/15 * (-1/2) - 3/10 : (-6/5) =
= -4/15 - 3/10 * (-5/6) =
= -4/15 + 1/4 =
= -(4*4)/(15*4) + (1*15)/(4*15) =
= -16/60 + 15/60 =
= -1/60
ответ: -1/60