The difference between 88 and 87 is: 
The difference between 34 and 17 is: 
The difference between 89 and 87 is: 
The difference between 88 and 81 is: 
The difference between 98 and 87 is: 
The difference between 88 and 17 is: 
The difference between 90 and 89 is: 
The difference between 88 and 87 is: 