The difference between 89 and 81 is: 
The difference between 30 and 14 is: 
The difference between 88 and 81 is: 
The difference between 89 and 81 is: 
The difference between 99 and 81 is: 
The difference between 89 and 21 is: 
The difference between 96 and 88 is: 
The difference between 89 and 81 is: 