The difference between 77 and 36 is: 
The difference between 60 and 18 is: 
The difference between 77 and 36 is: 
The difference between 77 and 34 is: 
The difference between 47 and 36 is: 
The difference between 77 and 66 is: 
The difference between 80 and 39 is: 
The difference between 77 and 36 is: 