The difference between 20 and 19 is: 
The difference between 50 and 38 is: 
The difference between 29 and 19 is: 
The difference between 20 and 10 is: 
The difference between 80 and 19 is: 
The difference between 20 and 19 is: 
The difference between 28 and 17 is: 
The difference between 20 and 19 is: 