The difference between 64 and 45 is: 
The difference between 74 and 23 is: 
The difference between 66 and 45 is: 
The difference between 64 and 41 is: 
The difference between 94 and 45 is: 
The difference between 64 and 55 is: 
The difference between 69 and 40 is: 
The difference between 64 and 45 is: 