The difference between 89 and 12 is: 
The difference between 77 and 68 is: 
The difference between 86 and 12 is: 
The difference between 89 and 16 is: 
The difference between 79 and 12 is: 
The difference between 89 and 22 is: 
The difference between 92 and 15 is: 
The difference between 89 and 12 is: 