The difference between 32 and 23 is: 
The difference between 57 and 12 is: 
The difference between 37 and 23 is: 
The difference between 32 and 21 is: 
The difference between 32 and 23 is: 
The difference between 32 and 13 is: 
The difference between 39 and 20 is: 
The difference between 32 and 23 is: 