The difference between 63 and 48 is: 
The difference between 77 and 21 is: 
The difference between 69 and 48 is: 
The difference between 63 and 41 is: 
The difference between 73 and 48 is: 
The difference between 63 and 38 is: 
The difference between 65 and 40 is: 
The difference between 63 and 48 is: 