The difference between 80 and 71 is: 
The difference between 41 and 18 is: 
The difference between 83 and 71 is: 
The difference between 80 and 70 is: 
The difference between 90 and 71 is: 
The difference between 80 and 11 is: 
The difference between 89 and 70 is: 
The difference between 80 and 71 is: 