1. Вычислить: 1) -2,3 - 14; 2) -7,8 - 3,4; 3) -6 - (-8) + 10; 4) $$-5\frac{4}{7}:\frac{5}{7}$$; 5) $$3\frac{1}{6} + \frac{5}{7}$$

1) -2,3 - 14 = -16,3 2) -7,8 - 3,4 = -11,2 3) -6 - (-8) + 10 = -6 + 8 + 10 = 2 + 10 = 12 4) $$-5\frac{4}{7}:\frac{5}{7} = -\frac{39}{7} : \frac{5}{7} = -\frac{39}{7} * \frac{7}{5} = -\frac{39}{5} = -7\frac{4}{5} = $$-7,8 5) $$3\frac{1}{6} + \frac{5}{7} = \frac{19}{6} + \frac{5}{7} = \frac{19*7}{6*7} + \frac{5*6}{7*6} = \frac{133}{42} + \frac{30}{42} = \frac{163}{42} = 3\frac{37}{42}$$ = $$3\frac{37}{42}$$