The difference between 80 and 31 is: 
The difference between 51 and 14 is: 
The difference between 88 and 31 is: 
The difference between 80 and 30 is: 
The difference between 80 and 31 is: 
The difference between 80 and 71 is: 
The difference between 89 and 30 is: 
The difference between 80 and 31 is: 