The difference between 54 and 30 is: 
The difference between 50 and 12 is: 
The difference between 56 and 30 is: 
The difference between 54 and 31 is: 
The difference between 64 and 30 is: 
The difference between 54 and 30 is: 
The difference between 63 and 39 is: 
The difference between 54 and 30 is: 