The difference between 81 and 57 is: 
The difference between 96 and 82 is: 
The difference between 88 and 57 is: 
The difference between 81 and 50 is: 
The difference between 81 and 57 is: 
The difference between 81 and 17 is: 
The difference between 87 and 53 is: 
The difference between 81 and 57 is: 