Ответ:
\(2\frac58=\frac{21}{8}\), \(\frac57-\frac23=\frac{1}{21}\), \(9\frac24=\frac{19}{2}\).
\(\frac{21}{8}\cdot\frac{1}{21}\cdot\frac{19}{2}=\frac{19}{16}\).
Ответ: \(\frac{19}{16}=1\frac{3}{16}\).
\(2\frac58=\frac{21}{8}\), \(\frac57-\frac23=\frac{1}{21}\), \(9\frac24=\frac{19}{2}\).
\(\frac{21}{8}\cdot\frac{1}{21}\cdot\frac{19}{2}=\frac{19}{16}\).
Ответ: \(\frac{19}{16}=1\frac{3}{16}\).