Question

0,4 + 8(5 - 0,8 * 5/8) - 5 : 2 1/2=?

Answer 1

$\frac{4}{10}+ 8 \cdot (5 - \frac{8}{10} \cdot \frac{5}{8})-5 : \frac{5}{2}=\frac{4}{10} +8 \cdot (5-\frac{1}{2}) - 5 \cdot \frac{2}{5}= \\ \\ =\frac{4}{10} + 8 \cdot \frac{9}{2} - 2=\frac{4}{10}+ 36 -2=\frac{4}{10}+34=\frac{4+340}{10}=34,4$