2.398 Вычислите: a) $$(4 \frac{3}{4} - 3 \frac{1}{12}) \cdot 4$$;

a) $$(4 \frac{3}{4} - 3 \frac{1}{12}) \cdot 4 = (4 \frac{9}{12} - 3 \frac{1}{12}) \cdot 4 = \frac{8}{12} \cdot 4 = \frac{2}{3} \cdot 4 = \frac{8}{3} = 2 \frac{2}{3}$$

Ответ: $$2 \frac{2}{3}$$