The difference between 69 and 20 is: 
The difference between 68 and 15 is: 
The difference between 69 and 20 is: 
The difference between 69 and 25 is: 
The difference between 89 and 20 is: 
The difference between 69 and 30 is: 
The difference between 78 and 29 is: 
The difference between 69 and 20 is: 