The difference between 51 and 13 is: 
The difference between 96 and 12 is: 
The difference between 54 and 13 is: 
The difference between 51 and 10 is: 
The difference between 21 and 13 is: 
The difference between 51 and 43 is: 
The difference between 58 and 10 is: 
The difference between 51 and 13 is: 