The difference between 77 and 38 is: 
The difference between 98 and 68 is: 
The difference between 79 and 38 is: 
The difference between 77 and 32 is: 
The difference between 57 and 38 is: 
The difference between 77 and 28 is: 
The difference between 79 and 30 is: 
The difference between 77 and 38 is: 