Ответ:

  1. \(\frac{11}{14}-\frac37=\frac{11}{14}-\frac6{14}=\frac5{14}\).
  2. \(1-\frac7{30}=\frac{30}{30}-\frac7{30}=\frac{23}{30}\).
  3. \(1\frac{13}{36}+6\frac38=\frac{98}{72}+\frac{459}{72}=\frac{557}{72}=7\frac{53}{72}\).
  4. \(7\frac5{18}-1\frac7{12}=\frac{262}{36}-\frac{57}{36}=\frac{205}{36}=5\frac{25}{36}\).
  5. \(\frac75\times\frac{15}{14}=\frac32=1\frac12\).
  6. \(1\frac1{15}\times1\frac1{24}=\frac{16}{15}\times\frac{25}{24}=\frac{10}{9}=1\frac19\).
  7. \(\frac65:\frac35=\frac65\times\frac53=2\).
  8. \(3\frac13:2=\frac{10}{3}\times\frac12=\frac53=1\frac23\).

Ответ: 1) \(\frac5{14}\); 2) \(\frac{23}{30}\); 3) \(7\frac{53}{72}\); 4) \(5\frac{25}{36}\); 5) \(1\frac12\); 6) \(1\frac19\); 7) \(2\); 8) \(1\frac23\).