The difference between 60 and 49 is: 
The difference between 80 and 66 is: 
The difference between 69 and 49 is: 
The difference between 60 and 40 is: 
The difference between 60 and 49 is: 
The difference between 60 and 59 is: 
The difference between 68 and 47 is: 
The difference between 60 and 49 is: 