The difference between 91 and 45 is: 
The difference between 79 and 19 is: 
The difference between 96 and 45 is: 
The difference between 91 and 40 is: 
The difference between 51 and 45 is: 
The difference between 91 and 65 is: 
The difference between 98 and 42 is: 
The difference between 91 and 45 is: 