The difference between 75 and 20 is: 
The difference between 99 and 66 is: 
The difference between 73 and 20 is: 
The difference between 75 and 21 is: 
The difference between 85 and 20 is: 
The difference between 75 and 40 is: 
The difference between 83 and 28 is: 
The difference between 75 and 20 is: 