The difference between 72 and 30 is: 
The difference between 23 and 18 is: 
The difference between 72 and 30 is: 
The difference between 72 and 30 is: 
The difference between 52 and 30 is: 
The difference between 72 and 20 is: 
The difference between 80 and 38 is: 
The difference between 72 and 30 is: 