Ё) \(\left(\frac{1}{2}+0,8-\frac{3}{5}\right)\cdot\left(3+5\frac{8}{25}-0,12\right)\)

1. \(\frac{1}{2}+0.8-\frac{3}{5}=0.5+0.8-0.6=0.7\).
2. \(3+5\frac{8}{25}-0.12=3+5.32-0.12=8.2\).
3. \(0.7\cdot 8.2=5.74\).

Ответ: 5,74.