The difference between 87 and 79 is: 
The difference between 53 and 19 is: 
The difference between 89 and 79 is: 
The difference between 87 and 75 is: 
The difference between 97 and 79 is: 
The difference between 87 and 49 is: 
The difference between 89 and 71 is: 
The difference between 87 and 79 is: 