\(2,04 - 1\frac{1}{4}\) : \(\frac{1}{20}\)

Решение:

1. 
   
   1\(\frac{1}{4}\) = 1.25
   
   


2. 
   
   2.04 - 1.25 = 0.79
   
   


3. 
   
   \(\frac{1}{20}\) = 0.05
   
   


4. 
   
   0.79 : 0.05 = 15.8
   
   

Ответ: 15.8