Ответ:
\(2\frac{3}{4}=\frac{11}{4}\), \(2\frac{1}{5}=\frac{11}{5}\).
\(\left(\frac{11}{4}+\frac{11}{5}\right)\cdot16=\frac{99}{20}\cdot16=\frac{396}{5}=79\frac{1}{5}\).
Ответ: \(79\frac{1}{5}\).
\(2\frac{3}{4}=\frac{11}{4}\), \(2\frac{1}{5}=\frac{11}{5}\).
\(\left(\frac{11}{4}+\frac{11}{5}\right)\cdot16=\frac{99}{20}\cdot16=\frac{396}{5}=79\frac{1}{5}\).
Ответ: \(79\frac{1}{5}\).