The difference between 49 and 19 is: 
The difference between 50 and 48 is: 
The difference between 49 and 19 is: 
The difference between 49 and 11 is: 
The difference between 49 and 19 is: 
The difference between 49 and 39 is: 
The difference between 40 and 11 is: 
The difference between 49 and 19 is: 