The difference between 79 and 56 is: 
The difference between 90 and 67 is: 
The difference between 79 and 56 is: 
The difference between 79 and 57 is: 
The difference between 89 and 56 is: 
The difference between 79 and 56 is: 
The difference between 81 and 58 is: 
The difference between 79 and 56 is: 