The difference between 47 and 28 is: 
The difference between 38 and 30 is: 
The difference between 49 and 28 is: 
The difference between 47 and 21 is: 
The difference between 97 and 28 is: 
The difference between 47 and 18 is: 
The difference between 49 and 20 is: 
The difference between 47 and 28 is: 