The difference between 66 and 38 is: 
The difference between 39 and 15 is: 
The difference between 69 and 38 is: 
The difference between 66 and 31 is: 
The difference between 76 and 38 is: 
The difference between 66 and 48 is: 
The difference between 69 and 31 is: 
The difference between 66 and 38 is: 