The difference between 32 and 18 is: 
The difference between 98 and 52 is: 
The difference between 39 and 18 is: 
The difference between 32 and 11 is: 
The difference between 42 and 18 is: 
The difference between 32 and 18 is: 
The difference between 37 and 13 is: 
The difference between 32 and 18 is: 