The difference between 55 and 40 is: 
The difference between 60 and 20 is: 
The difference between 55 and 40 is: 
The difference between 55 and 42 is: 
The difference between 85 and 40 is: 
The difference between 55 and 40 is: 
The difference between 62 and 47 is: 
The difference between 55 and 40 is: 