93. Выполните действия: a) 12+3\frac{5}{8}-1\frac{1}{6}; 6) 7\frac{8}{15}+\left(5\frac{7}{10}-4\right).

а) $$12+3\frac{5}{8}-1\frac{1}{6} = 15\frac{5}{8}-1\frac{1}{6} = 15\frac{15}{24}-1\frac{4}{24} = 14\frac{11}{24}$$

Ответ:$$14\frac{11}{24}$$

б) $$7\frac{8}{15}+\left(5\frac{7}{10}-4\right) = 7\frac{8}{15}+1\frac{7}{10} = 7\frac{16}{30}+1\frac{21}{30} = 8\frac{37}{30} = 9\frac{7}{30}$$

Ответ:$$9\frac{7}{30}$$