Ответ:\(5\frac{1}{8}+13\frac{3}{4}=5\frac{1}{8}+13\frac{6}{8}=18\frac{7}{8}\).\(19\frac{5}{6}+10\frac{1}{3}=19\frac{5}{6}+10\frac{2}{6}=29\frac{7}{6}=30\frac{1}{6}\).Ответ: а) 18 7/8; б) 30 1/6.