The difference between 70 and 49 is: 
The difference between 27 and 15 is: 
The difference between 79 and 49 is: 
The difference between 70 and 40 is: 
The difference between 60 and 49 is: 
The difference between 70 and 19 is: 
The difference between 78 and 47 is: 
The difference between 70 and 49 is: 