The difference between 72 and 15 is: 
The difference between 83 and 25 is: 
The difference between 79 and 15 is: 
The difference between 72 and 11 is: 
The difference between 52 and 15 is: 
The difference between 72 and 45 is: 
The difference between 78 and 11 is: 
The difference between 72 and 15 is: 