The difference between 57 and 40 is: 
The difference between 63 and 59 is: 
The difference between 52 and 40 is: 
The difference between 57 and 40 is: 
The difference between 97 and 40 is: 
The difference between 57 and 40 is: 
The difference between 66 and 49 is: 
The difference between 57 and 40 is: 