The difference between 99 and 50 is: 
The difference between 82 and 39 is: 
The difference between 94 and 50 is: 
The difference between 99 and 55 is: 
The difference between 89 and 50 is: 
The difference between 99 and 20 is: 
The difference between 102 and 53 is: 
The difference between 99 and 50 is: 