The difference between 57 and 55 is: 
The difference between 70 and 60 is: 
The difference between 56 and 55 is: 
The difference between 57 and 56 is: 
The difference between 97 and 55 is: 
The difference between 57 and 15 is: 
The difference between 60 and 58 is: 
The difference between 57 and 55 is: 