The difference between 72 and 60 is: 
The difference between 93 and 40 is: 
The difference between 71 and 60 is: 
The difference between 72 and 61 is: 
The difference between 82 and 60 is: 
The difference between 72 and 40 is: 
The difference between 80 and 68 is: 
The difference between 72 and 60 is: 