The difference between 31 and 22 is: 
The difference between 82 and 57 is: 
The difference between 33 and 22 is: 
The difference between 31 and 20 is: 
The difference between 71 and 22 is: 
The difference between 31 and 12 is: 
The difference between 39 and 20 is: 
The difference between 31 and 22 is: 