2) 1) Вычислите: $$\frac{15}{16} : (\frac{3}{8} + \frac{13}{32})$$.

Решение: 1. $$\frac{3}{8} + \frac{13}{32} = \frac{3 * 4}{8 * 4} + \frac{13}{32} = \frac{12}{32} + \frac{13}{32} = \frac{25}{32}$$ 2. $$\frac{15}{16} : \frac{25}{32} = \frac{15}{16} * \frac{32}{25} = \frac{15 * 32}{16 * 25} = \frac{15 * 2}{1 * 25} = \frac{3 * 2}{1 * 5} = \frac{6}{5} = 1 \frac{1}{5} = 1.2$$ Ответ: 1.2