The difference between 79 and 30 is: 
The difference between 45 and 27 is: 
The difference between 71 and 30 is: 
The difference between 79 and 31 is: 
The difference between 89 and 30 is: 
The difference between 79 and 30 is: 
The difference between 86 and 37 is: 
The difference between 79 and 30 is: 