The difference between 72 and 24 is: 
The difference between 43 and 18 is: 
The difference between 78 and 24 is: 
The difference between 72 and 21 is: 
The difference between 72 and 24 is: 
The difference between 72 and 64 is: 
The difference between 79 and 21 is: 
The difference between 72 and 24 is: 