Question

2 целых 8/15-(1целая3/10+2/5)=?
5 класс​

Answer 1

$2 \frac{8}{15} - 1 \frac{3}{10} - \frac{2}{5} = \frac{38}{15} - \frac{13}{10} - \frac{2}{5} =$
$\frac{38 \times 2 - 13 \times 3 - 2 \times 6}{30} = \frac{76 - 39 - 12}{30} = \frac{25}{30} = \frac{5}{6}$