The difference between 77 and 54 is: 
The difference between 92 and 90 is: 
The difference between 77 and 54 is: 
The difference between 77 and 52 is: 
The difference between 97 and 54 is: 
The difference between 77 and 54 is: 
The difference between 80 and 57 is: 
The difference between 77 and 54 is: 