The difference between 81 and 11 is: 
The difference between 35 and 31 is: 
The difference between 84 and 11 is: 
The difference between 81 and 10 is: 
The difference between 41 and 11 is: 
The difference between 81 and 21 is: 
The difference between 80 and 11 is: 
The difference between 81 and 11 is: 