a) $$ \frac{3}{13}+5\frac{7}{13} = 5\frac{3+7}{13} = 5\frac{10}{13} $$
Ответ: $$5\frac{10}{13}$$
б) $$ 6\frac{2}{17}+3\frac{11}{17} = 6+3 + \frac{2+11}{17} = 9 + \frac{13}{17} = 9\frac{13}{17} $$
Ответ: $$9\frac{13}{17}$$
г) $$ 8+7\frac{5}{6} = 15\frac{5}{6} $$
Ответ: $$15\frac{5}{6}$$
e) $$ 9\frac{11}{15}+5\frac{8}{15} = 9+5 + \frac{11+8}{15} = 14 + \frac{19}{15} = 14 + 1\frac{4}{15} = 15\frac{4}{15} $$
Ответ: $$15\frac{4}{15}$$