The difference between 50 and 12 is: 
The difference between 53 and 49 is: 
The difference between 57 and 12 is: 
The difference between 50 and 10 is: 
The difference between 20 and 12 is: 
The difference between 50 and 12 is: 
The difference between 58 and 10 is: 
The difference between 50 and 12 is: 