The difference between 19 and 10 is: 
The difference between 91 and 60 is: 
The difference between 18 and 10 is: 
The difference between 19 and 18 is: 
The difference between 89 and 10 is: 
The difference between 19 and 10 is: 
The difference between 23 and 14 is: 
The difference between 19 and 10 is: 