Это работа с отрицательным показателем.
5) = 4/3·0,27 - 10/3·0,15 - 1500 ·(-0,001)= 9/25 - 1/2 +1,5 = 9/25 +1 = 1 9/25
6) = (6/64 · 16/3 - 1/3):(-1/27) -1 = (1/2 - 1/3) ·(-27) -1 = 1/6·(-27) - 1= -9/2 -1 =
= - 4, 5 -1= - 5,5
7) = 1000/27 +7/3 +3 +6 = 37 1/27 + 2 1/3 + 9 = 48 10/27
8) = 9/4 - 9 + 1/8 - 16·16 = 2 1/4 - 9 + 1/8 - 256 = 2 3/8 - 265 = -262 5/8