The difference between 36 and 20 is: 
The difference between 99 and 51 is: 
The difference between 35 and 20 is: 
The difference between 36 and 25 is: 
The difference between 76 and 20 is: 
The difference between 36 and 10 is: 
The difference between 42 and 26 is: 
The difference between 36 and 20 is: 