Question

Resolvendo -1+2/3+0,8.3/4,obtemos:

Answer 1

$- 1 + \frac{2}{3} + 0.8 \times \frac{3}{4} \\ \\ - 1 + \frac{2}{3} + \frac{4}{5} \times \frac{3}{4} \\ \\ - 1 + \frac{2}{3} + \frac{1}{5} \times 3 \\ \\ - 1 + \frac{2}{3} + \frac{3}{5} = \frac{4}{15}$