The difference between 81 and 10 is: 
The difference between 65 and 47 is: 
The difference between 87 and 10 is: 
The difference between 81 and 10 is: 
The difference between 61 and 10 is: 
The difference between 81 and 70 is: 
The difference between 90 and 19 is: 
The difference between 81 and 10 is: 