The difference between 49 and 30 is: 
The difference between 93 and 78 is: 
The difference between 48 and 30 is: 
The difference between 49 and 32 is: 
The difference between 79 and 30 is: 
The difference between 49 and 20 is: 
The difference between 54 and 35 is: 
The difference between 49 and 30 is: 