The difference between 68 and 45 is: 
The difference between 54 and 52 is: 
The difference between 66 and 45 is: 
The difference between 68 and 47 is: 
The difference between 78 and 45 is: 
The difference between 68 and 45 is: 
The difference between 70 and 47 is: 
The difference between 68 and 45 is: 