1 а) Вычислите: $$16 \cdot \frac{1}{48} - \frac{21}{2}$$

а) $$16 \cdot \frac{1}{48} - \frac{21}{2} = \frac{16}{48} - \frac{21}{2} = \frac{1}{3} - \frac{21}{2} = \frac{2}{6} - \frac{63}{6} = \frac{2-63}{6} = \frac{-61}{6} = -10\frac{1}{6}$$

Ответ: $$-10\frac{1}{6}$$