The difference between 89 and 66 is: 
The difference between 80 and 79 is: 
The difference between 87 and 66 is: 
The difference between 89 and 61 is: 
The difference between 99 and 66 is: 
The difference between 89 and 26 is: 
The difference between 90 and 67 is: 
The difference between 89 and 66 is: 