The difference between 58 and 40 is: 
The difference between 99 and 31 is: 
The difference between 59 and 40 is: 
The difference between 58 and 45 is: 
The difference between 88 and 40 is: 
The difference between 58 and 40 is: 
The difference between 65 and 47 is: 
The difference between 58 and 40 is: 