The difference between 78 and 66 is: 
The difference between 87 and 71 is: 
The difference between 79 and 66 is: 
The difference between 78 and 64 is: 
The difference between 88 and 66 is: 
The difference between 78 and 26 is: 
The difference between 81 and 69 is: 
The difference between 78 and 66 is: 