The difference between 81 and 41 is: 
The difference between 46 and 37 is: 
The difference between 83 and 41 is: 
The difference between 81 and 40 is: 
The difference between 71 and 41 is: 
The difference between 81 and 21 is: 
The difference between 80 and 42 is: 
The difference between 81 and 41 is: 