91 \(\cdot\) \(\frac{2}{5}\) : 5\(\frac{3}{5}\) + 3 \(\cdot\) \(\frac{12}{25}\) : \(\frac{6}{25}\)

Решение:

Выполним действия по порядку:

1. 
   \[ 91 \cdot \frac{2}{5} = \frac{182}{5} \]
   
2. 
   \[ 5\frac{3}{5} = \frac{28}{5} \]
   
3. 
   \[ \frac{182}{5} : \frac{28}{5} = \frac{182}{5} \cdot \frac{5}{28} = \frac{182}{28} = \frac{13}{2} \]
   
4. 
   \[ 3 \cdot \frac{12}{25} = \frac{36}{25} \]
   
5. 
   \[ \frac{36}{25} : \frac{6}{25} = \frac{36}{25} \cdot \frac{25}{6} = 6 \]
   
6. 
   \[ \frac{13}{2} + 6 = 6.5 + 6 = 12.5 \]
   

Ответ: 12.5