Ответ:

а) \(7+3\dfrac{5}{8}=10\dfrac{5}{8}\).

б) \(8\dfrac{3}{5}+\dfrac{1}{15}=8+\dfrac{9}{15}+\dfrac{1}{15}=8\dfrac{2}{3}\).

в) \(2-\dfrac{5}{6}=1\dfrac{1}{6}\).

г) \(6-5\dfrac{5}{8}=\dfrac{3}{8}\).

д) \(6\dfrac{3}{10}-\dfrac{11}{15}=6+\dfrac{9}{30}-\dfrac{22}{30}=5\dfrac{17}{30}\).

е) \(7\dfrac{4}{7}-5\dfrac{7}{9}=2+\dfrac{36}{63}-\dfrac{49}{63}=1\dfrac{50}{63}\).

Ответ: а) \(10\dfrac{5}{8}\); б) \(8\dfrac{2}{3}\); в) \(1\dfrac{1}{6}\); г) \(\dfrac{3}{8}\); д) \(5\dfrac{17}{30}\); е) \(1\dfrac{50}{63}\).