Question

2-(2/3+0,8) ,,,,,,,,,,,,,,,,,,,​

Answer 1

$2 - ( \frac{2}{3} + 0.8) = 2 - ( \frac{2}{3} + \frac{8}{10}) = \\ = 2 - ( \frac{2}{3} + \frac{4}{5}) = 2 - \frac{22}{15} = \\ = 1 \frac{15}{15} - 1 \frac{7}{15} = \frac{8}{15} \: .$