5. Вычислите: 1) 5/12 + 1/6; 2) 4/15 + 7/30; 3) 5/28 + 1/14; 4) 12/33 + 1/11; 5) 33/56 + 5/8; 6) 5/16 + 3/64.

1. \(\frac{5}{12}+\frac{2}{12}=\frac{7}{12}\).
2. \(\frac{8}{30}+\frac{7}{30}=\frac{15}{30}=\frac12\).
3. \(\frac{5}{28}+\frac{2}{28}=\frac{7}{28}=\frac14\).
4. \(\frac{12}{33}+\frac{1}{11}=\frac4{11}+\frac1{11}=\frac5{11}\).
5. \(\frac{33}{56}+\frac{35}{56}=\frac{68}{56}=\frac{17}{14}\).
6. \(\frac{20}{64}+\frac3{64}=\frac{23}{64}\).

Ответ: 1) \(\frac7{12}\); 2) \(\frac12\); 3) \(\frac14\); 4) \(\frac5{11}\); 5) \(\frac{17}{14}\); 6) \(\frac{23}{64}\).