Odpowiedź :
a)⅘-(0,8-1,2×⅚)÷(-½)³=8/10 - (8/10 - 12/10×5/6)÷(-1/8) =
8/10 - (8/10 - 1) × (-8) = 8/10 - (-2/10)× (-8) = 8/10 - 8/5= - 8/10 = -⅘
b)[2²-√2¼×(-1⅓)²]÷(-⅓)³= (4 - 3/2 × 16/9)÷(-1/27)=
(4- 8/3) × (-27) = 4/3 × (-27)= -36
8/10 - (8/10 - 1) × (-8) = 8/10 - (-2/10)× (-8) = 8/10 - 8/5= - 8/10 = -⅘
b)[2²-√2¼×(-1⅓)²]÷(-⅓)³= (4 - 3/2 × 16/9)÷(-1/27)=
(4- 8/3) × (-27) = 4/3 × (-27)= -36