The difference between 83 and 23 is: 
The difference between 75 and 39 is: 
The difference between 85 and 23 is: 
The difference between 83 and 21 is: 
The difference between 73 and 23 is: 
The difference between 83 and 43 is: 
The difference between 80 and 21 is: 
The difference between 83 and 23 is: 