The difference between 81 and 47 is: 
The difference between 60 and 33 is: 
The difference between 88 and 47 is: 
The difference between 81 and 40 is: 
The difference between 51 and 47 is: 
The difference between 81 and 37 is: 
The difference between 86 and 42 is: 
The difference between 81 and 47 is: 