The difference between 64 and 60 is: 
The difference between 43 and 13 is: 
The difference between 68 and 60 is: 
The difference between 64 and 60 is: 
The difference between 84 and 60 is: 
The difference between 64 and 20 is: 
The difference between 71 and 67 is: 
The difference between 64 and 60 is: 