The difference between 81 and 63 is: 
The difference between 80 and 47 is: 
The difference between 86 and 63 is: 
The difference between 81 and 60 is: 
The difference between 81 and 63 is: 
The difference between 81 and 43 is: 
The difference between 88 and 60 is: 
The difference between 81 and 63 is: 