Вопрос:

6. Вычислите: \(3\frac{2}{7}:\left(\frac{5}{6}-\frac{11}{3}\right)+7\cdot1\frac{4}{9}\).

Ответ:

\(3\frac{2}{7}=\frac{23}{7}\), \(\frac{5}{6}-\frac{11}{3}=\frac{5}{6}-\frac{22}{6}=-\frac{17}{6}\), \(1\frac{4}{9}=\frac{13}{9}\).

\(\frac{23}{7}:\left(-\frac{17}{6}\right)=-\frac{138}{119}\), а \(7\cdot\frac{13}{9}=\frac{91}{9}\).

\(-\frac{138}{119}+\frac{91}{9}=\frac{-1242+10829}{1071}=\frac{9587}{1071}=8\frac{1019}{1071}\).

Ответ: \(8\frac{1019}{1071}\)