The difference between 71 and 66 is: 
The difference between 36 and 31 is: 
The difference between 78 and 66 is: 
The difference between 71 and 60 is: 
The difference between 81 and 66 is: 
The difference between 71 and 36 is: 
The difference between 76 and 61 is: 
The difference between 71 and 66 is: 