ж) $$-0.2 + (\frac{1}{15}) = -\frac{2}{10} + \frac{1}{15} = -\frac{1}{5} + \frac{1}{15} = -\frac{1 \cdot 3}{5 \cdot 3} + \frac{1}{15} = -\frac{3}{15} + \frac{1}{15} = -\frac{2}{15}$$
Ответ: $$- \frac{2}{15}$$