The difference between 57 and 13 is: 
The difference between 82 and 61 is: 
The difference between 54 and 13 is: 
The difference between 57 and 13 is: 
The difference between 77 and 13 is: 
The difference between 57 and 13 is: 
The difference between 62 and 18 is: 
The difference between 57 and 13 is: 