The difference between 81 and 76 is: 
The difference between 79 and 64 is: 
The difference between 89 and 76 is: 
The difference between 81 and 70 is: 
The difference between 91 and 76 is: 
The difference between 81 and 66 is: 
The difference between 86 and 71 is: 
The difference between 81 and 76 is: 