The difference between 83 and 68 is: 
The difference between 77 and 18 is: 
The difference between 89 and 68 is: 
The difference between 83 and 61 is: 
The difference between 73 and 68 is: 
The difference between 83 and 68 is: 
The difference between 85 and 60 is: 
The difference between 83 and 68 is: 