The difference between 47 and 30 is: 
The difference between 81 and 31 is: 
The difference between 48 and 30 is: 
The difference between 47 and 35 is: 
The difference between 97 and 30 is: 
The difference between 47 and 20 is: 
The difference between 56 and 39 is: 
The difference between 47 and 30 is: 