The difference between 40 and 19 is: 
The difference between 88 and 45 is: 
The difference between 49 and 19 is: 
The difference between 40 and 10 is: 
The difference between 90 and 19 is: 
The difference between 40 and 39 is: 
The difference between 41 and 10 is: 
The difference between 40 and 19 is: 