Question

Вычислите (6-2 4/5) * 3 1/8 - 1 3/5 : 1/4

Answer 1

 (6-2 4/5) * 3 1/8 - 1 3/5 : 1/4

$6 - 2 \frac{4}{5} = \frac{30}{5} - \frac{14}{5}=\frac{16}{5} \\ \\ \frac{16}{5}*3 \frac{1}{8}=\frac{16}{5}* \frac{17}{8} = \frac{272}{40} \\ \\ 1\frac{3}{5}:\frac{1}{4}=\frac{8}{5}*4=\frac{64}{5} \\ \\ \frac{272}{40} -\frac{64}{5}=\frac{272}{40} -\frac{512}{40}=-\frac{240}{40}=-6$

Ответ: -6