The difference between 49 and 20 is: 
The difference between 78 and 63 is: 
The difference between 44 and 20 is: 
The difference between 49 and 24 is: 
The difference between 79 and 20 is: 
The difference between 49 and 10 is: 
The difference between 52 and 23 is: 
The difference between 49 and 20 is: 