II) -2.7 * 7/4 * (-1/9) - 0.625

Решение:

• \[ -2.7 \cdot \frac{7}{4} \cdot \left( -\frac{1}{9} \right) - 0.625 \]
• \[ -\frac{27}{10} \cdot \frac{7}{4} \cdot \left( -\frac{1}{9} \right) - \frac{625}{1000} \]
• \[ \frac{27 \cdot 7 \cdot 1}{10 \cdot 4 \cdot 9} - \frac{5}{8} \]
• \[ \frac{3 \cdot 9 \cdot 7}{10 \cdot 4 \cdot 9} - \frac{5}{8} \]
• \[ \frac{21}{40} - \frac{5 \cdot 5}{8 \cdot 5} \]
• \[ \frac{21}{40} - \frac{25}{40} = \frac{21 - 25}{40} = \frac{-4}{40} = -\frac{1}{10} = -0.1 \]

Ответ: -0.1