2. Вычислите: \frac{11}{20} - \frac{12}{25} ⋅ \frac{15}{16}

Решение:

1. \(\frac{12}{25} \cdot \frac{15}{16} = \frac{12 \cdot 15}{25 \cdot 16} = \frac{3 \cdot 3}{5 \cdot 4} = \frac{9}{20}\)
2. \(\frac{11}{20} - \frac{9}{20} = \frac{11 - 9}{20} = \frac{2}{20} = \frac{1}{10}\)

Ответ: \(\frac{1}{10}\)