The difference between 78 and 23 is: 
The difference between 20 and 17 is: 
The difference between 78 and 23 is: 
The difference between 78 and 24 is: 
The difference between 68 and 23 is: 
The difference between 78 and 63 is: 
The difference between 84 and 29 is: 
The difference between 78 and 23 is: 