The difference between 71 and 12 is: 
The difference between 61 and 22 is: 
The difference between 73 and 12 is: 
The difference between 71 and 10 is: 
The difference between 21 and 12 is: 
The difference between 71 and 22 is: 
The difference between 79 and 10 is: 
The difference between 71 and 12 is: 