The difference between 27 and 20 is: 
The difference between 81 and 54 is: 
The difference between 25 and 20 is: 
The difference between 27 and 23 is: 
The difference between 47 and 20 is: 
The difference between 27 and 10 is: 
The difference between 31 and 24 is: 
The difference between 27 and 20 is: 