Ответ:
\(\frac5{18}-\frac7{24}=\frac{20-21}{72}=-\frac1{72}\).
\(3\frac35=\frac{18}{5}\), поэтому \(\frac{18}{5}\cdot\left(-\frac1{72}\right)=-\frac1{20}\).
\(\frac34-\frac1{20}-\frac15=\frac{15-1-4}{20}=\frac12\).
Ответ: \(\frac12\).
\(\frac5{18}-\frac7{24}=\frac{20-21}{72}=-\frac1{72}\).
\(3\frac35=\frac{18}{5}\), поэтому \(\frac{18}{5}\cdot\left(-\frac1{72}\right)=-\frac1{20}\).
\(\frac34-\frac1{20}-\frac15=\frac{15-1-4}{20}=\frac12\).
Ответ: \(\frac12\).