The difference between 30 and 17 is: 
The difference between 83 and 42 is: 
The difference between 39 and 17 is: 
The difference between 30 and 10 is: 
The difference between 80 and 17 is: 
The difference between 30 and 17 is: 
The difference between 39 and 16 is: 
The difference between 30 and 17 is: 