The difference between 66 and 40 is: 
The difference between 77 and 34 is: 
The difference between 69 and 40 is: 
The difference between 66 and 42 is: 
The difference between 96 and 40 is: 
The difference between 66 and 30 is: 
The difference between 71 and 45 is: 
The difference between 66 and 40 is: 