Вычислить: 1) -3$$\frac{1}{8}$$ · 16; 2) -2,84 - 5,49; 3) 2 - (-6) - 8; 4) -2$$\frac{4}{15}$$ : (-1,7); 5) 3$$\frac{3}{4}$$ - 5$$\frac{5}{6}$$.

1) $$-3\frac{1}{8} \cdot 16 = -\frac{25}{8} \cdot 16 = -25 \cdot 2 = -50$$ 2) $$-2,84 - 5,49 = -8,33$$ 3) $$2 - (-6) - 8 = 2 + 6 - 8 = 8 - 8 = 0$$ 4) $$-2\frac{4}{15} : (-1,7) = -\frac{34}{15} : (-\frac{17}{10}) = \frac{34}{15} \cdot \frac{10}{17} = \frac{2}{3} \cdot \frac{2}{1} = \frac{4}{3} = 1\frac{1}{3}$$ 5) $$3\frac{3}{4} - 5\frac{5}{6} = \frac{15}{4} - \frac{35}{6} = \frac{45}{12} - \frac{70}{12} = -\frac{25}{12} = -2\frac{1}{12}$$