The difference between 78 and 77 is: 
The difference between 45 and 42 is: 
The difference between 79 and 77 is: 
The difference between 78 and 71 is: 
The difference between 88 and 77 is: 
The difference between 78 and 67 is: 
The difference between 80 and 79 is: 
The difference between 78 and 77 is: 