The difference between 81 and 53 is: 
The difference between 78 and 34 is: 
The difference between 89 and 53 is: 
The difference between 81 and 50 is: 
The difference between 81 and 53 is: 
The difference between 81 and 23 is: 
The difference between 89 and 51 is: 
The difference between 81 and 53 is: 