1)-14\frac{8}{15}+13\frac{3}{10} = 2)-3\frac{4}{5}+\left(-\frac{5}{7}\right) = 3) 17\frac{3}{14}+\left(-4\frac{4}{21}\right) = 4)-6\frac{2}{39}+\frac{3}{26} =

4 уровень. Найдите значение выражения

1. $$-14\frac{8}{15}+13\frac{3}{10} = -14\frac{16}{30}+13\frac{9}{30} = -1\frac{7}{30}$$
2. $$-3\frac{4}{5}+\left(-\frac{5}{7}\right) = -3\frac{28}{35}+\left(-\frac{25}{35}\right) = -3\frac{53}{35} = -4\frac{18}{35}$$
3. $$17\frac{3}{14}+\left(-4\frac{4}{21}\right) = 17\frac{9}{42}-4\frac{8}{42} = 13\frac{1}{42}$$
4. $$-6\frac{2}{39}+\frac{3}{26} = -6\frac{4}{78}+\frac{9}{78} = -6\frac{5}{78}$$

Ответ: 1) $$-1\frac{7}{30}$$; 2) $$-4\frac{18}{35}$$; 3) $$13\frac{1}{42}$$; 4) $$-6\frac{5}{78}$$