The difference between 64 and 44 is: 
The difference between 91 and 60 is: 
The difference between 65 and 44 is: 
The difference between 64 and 41 is: 
The difference between 54 and 44 is: 
The difference between 64 and 34 is: 
The difference between 60 and 41 is: 
The difference between 64 and 44 is: 