The difference between 19 and 12 is: 
The difference between 95 and 16 is: 
The difference between 13 and 12 is: 
The difference between 19 and 15 is: 
The difference between 79 and 12 is: 
The difference between 19 and 12 is: 
The difference between 21 and 14 is: 
The difference between 19 and 12 is: 