6) $$2\frac{1}{6} \times 3$$

$$2\frac{1}{6} \times 3 = \frac{2 \times 6 + 1}{6} \times 3 = \frac{12 + 1}{6} \times 3 = \frac{13}{6} \times 3 = \frac{13 \times 3}{6} = \frac{13 \times 3}{2 \times 3} = \frac{13}{2} = 6\frac{1}{2}$$ Ответ: $$6\frac{1}{2}$$