The difference between 81 and 36 is: 
The difference between 76 and 60 is: 
The difference between 89 and 36 is: 
The difference between 81 and 30 is: 
The difference between 61 and 36 is: 
The difference between 81 and 56 is: 
The difference between 86 and 31 is: 
The difference between 81 and 36 is: 