The difference between 68 and 56 is: 
The difference between 77 and 48 is: 
The difference between 67 and 56 is: 
The difference between 68 and 51 is: 
The difference between 98 and 56 is: 
The difference between 68 and 56 is: 
The difference between 71 and 59 is: 
The difference between 68 and 56 is: 