The difference between 57 and 45 is: 
The difference between 93 and 56 is: 
The difference between 56 and 45 is: 
The difference between 57 and 45 is: 
The difference between 77 and 45 is: 
The difference between 57 and 15 is: 
The difference between 60 and 48 is: 
The difference between 57 and 45 is: 