Вычислите: 11/18+13/72+(-17/48)+(-7/72).

Ответ:

\[\frac{11}{48} + \frac{13}{72} + \left( - \frac{17}{48} \right) + \left( - \frac{7}{72} \right) =\]

\[= - \left( \frac{17}{48} - \frac{11}{48} \right) + \left( \frac{13}{72} - \frac{7}{72} \right) =\]

\[= - \frac{6}{48} + \frac{6}{72} =\]

\[= - \frac{1}{8} + \frac{1}{12} = - \frac{3}{24} + \frac{2}{24} = - \frac{1}{24}\]