The difference between 50 and 40 is: 
The difference between 47 and 36 is: 
The difference between 52 and 40 is: 
The difference between 50 and 40 is: 
The difference between 90 and 40 is: 
The difference between 50 and 40 is: 
The difference between 54 and 46 is: 
The difference between 50 and 40 is: 