The difference between 82 and 20 is: 
The difference between 78 and 42 is: 
The difference between 87 and 20 is: 
The difference between 82 and 21 is: 
The difference between 32 and 20 is: 
The difference between 82 and 60 is: 
The difference between 91 and 29 is: 
The difference between 82 and 20 is: 