The difference between 81 and 17 is: 
The difference between 56 and 29 is: 
The difference between 88 and 17 is: 
The difference between 81 and 10 is: 
The difference between 81 and 17 is: 
The difference between 81 and 67 is: 
The difference between 88 and 14 is: 
The difference between 81 and 17 is: 