The difference between 28 and 17 is: 
The difference between 48 and 38 is: 
The difference between 28 and 17 is: 
The difference between 28 and 15 is: 
The difference between 78 and 17 is: 
The difference between 28 and 17 is: 
The difference between 30 and 19 is: 
The difference between 28 and 17 is: 