The difference between 90 and 75 is: 
The difference between 77 and 18 is: 
The difference between 98 and 75 is: 
The difference between 90 and 70 is: 
The difference between 90 and 75 is: 
The difference between 90 and 85 is: 
The difference between 96 and 71 is: 
The difference between 90 and 75 is: 