The difference between 80 and 70 is: 
The difference between 91 and 22 is: 
The difference between 82 and 70 is: 
The difference between 80 and 70 is: 
The difference between 90 and 70 is: 
The difference between 80 and 40 is: 
The difference between 82 and 73 is: 
The difference between 80 and 70 is: 