23 : \(6\frac{5}{17} + 1\frac{12}{17}\) - \(4\frac{2}{5} - 2\frac{3}{5}\) : 5

Решение:

1. 
   
   6\(\frac{5}{17}\) = \(\frac{107}{17}\)
   
   


2. 
   
   1\(\frac{12}{17}\) = \(\frac{29}{17}\)
   
   


3. 
   
   \(\frac{107}{17}\) + \(\frac{29}{17}\) = \(\frac{136}{17}\) = 8
   
   


4. 
   
   23 : 8 = 2.875
   
   


5. 
   
   4\(\frac{2}{5}\) = \(\frac{22}{5}\) = 4.4
   
   


6. 
   
   2\(\frac{3}{5}\) = \(\frac{13}{5}\) = 2.6
   
   


7. 
   
   4.4 - 2.6 = 1.8
   
   


8. 
   
   1.8 : 5 = 0.36
   
   


9. 
   
   2.875 - 0.36 = 2.515
   
   

Ответ: 2.515