The difference between 66 and 35 is: 
The difference between 87 and 21 is: 
The difference between 69 and 35 is: 
The difference between 66 and 30 is: 
The difference between 76 and 35 is: 
The difference between 66 and 15 is: 
The difference between 70 and 39 is: 
The difference between 66 and 35 is: 