Question

dois quintos +um terço- tres decimos​

Answer 1

$\frac{2}{5} + \frac{1}{3} - \frac{3}{10} \\ \\ \frac{6.2 + 10.1 - 3.3}{30} \\ \\ \frac{12 + 10 - 9}{30} \\ \\ \frac{13}{30}$