The difference between 61 and 48 is: 
The difference between 74 and 63 is: 
The difference between 69 and 48 is: 
The difference between 61 and 40 is: 
The difference between 81 and 48 is: 
The difference between 61 and 28 is: 
The difference between 65 and 42 is: 
The difference between 61 and 48 is: 