The difference between 33 and 28 is: 
The difference between 60 and 12 is: 
The difference between 39 and 28 is: 
The difference between 33 and 22 is: 
The difference between 83 and 28 is: 
The difference between 33 and 18 is: 
The difference between 36 and 21 is: 
The difference between 33 and 28 is: 