The difference between 90 and 17 is: 
The difference between 78 and 21 is: 
The difference between 98 and 17 is: 
The difference between 90 and 10 is: 
The difference between 40 and 17 is: 
The difference between 90 and 67 is: 
The difference between 95 and 12 is: 
The difference between 90 and 17 is: 