3) \( \frac{5}{12} : 0.2 + \frac{7}{5} \)

Решение:

\( \frac{5}{12} : 0.2 + \frac{7}{5} = \frac{5}{12} : \frac{2}{10} + \frac{7}{5} = \frac{5}{12} : \frac{1}{5} + \frac{7}{5} = \frac{5}{12} \cdot 5 + \frac{7}{5} = \frac{25}{12} + \frac{7}{5} = \frac{25 \cdot 5}{12 \cdot 5} + \frac{7 \cdot 12}{5 \cdot 12} = \frac{125}{60} + \frac{84}{60} = \frac{209}{60} \)

Ответ: \( \frac{209}{60} \).