The difference between 39 and 19 is: 
The difference between 66 and 34 is: 
The difference between 39 and 19 is: 
The difference between 39 and 15 is: 
The difference between 89 and 19 is: 
The difference between 39 and 19 is: 
The difference between 30 and 11 is: 
The difference between 39 and 19 is: 