The difference between 78 and 11 is: 
The difference between 97 and 90 is: 
The difference between 73 and 11 is: 
The difference between 78 and 11 is: 
The difference between 88 and 11 is: 
The difference between 78 and 21 is: 
The difference between 83 and 16 is: 
The difference between 78 and 11 is: 