Ответ:
\(\frac{7}{12}+\frac{5}{6}=\frac{17}{12}\), \(2\frac{5}{6}=\frac{17}{6}\).
\(\frac{17}{12}:\frac{17}{6}=\frac12\).
\(-1+\frac12-\frac23=-\frac{7}{6}=-1\frac{1}{6}\).
Ответ: \(-1\frac{1}{6}\).
\(\frac{7}{12}+\frac{5}{6}=\frac{17}{12}\), \(2\frac{5}{6}=\frac{17}{6}\).
\(\frac{17}{12}:\frac{17}{6}=\frac12\).
\(-1+\frac12-\frac23=-\frac{7}{6}=-1\frac{1}{6}\).
Ответ: \(-1\frac{1}{6}\).