The difference between 50 and 45 is: 
The difference between 97 and 17 is: 
The difference between 56 and 45 is: 
The difference between 50 and 40 is: 
The difference between 50 and 45 is: 
The difference between 50 and 15 is: 
The difference between 57 and 42 is: 
The difference between 50 and 45 is: 