The difference between 79 and 20 is: 
The difference between 84 and 82 is: 
The difference between 78 and 20 is: 
The difference between 79 and 20 is: 
The difference between 99 and 20 is: 
The difference between 79 and 10 is: 
The difference between 81 and 22 is: 
The difference between 79 and 20 is: 