The difference between 24 and 13 is: 
The difference between 58 and 45 is: 
The difference between 28 and 13 is: 
The difference between 24 and 12 is: 
The difference between 94 and 13 is: 
The difference between 24 and 13 is: 
The difference between 30 and 19 is: 
The difference between 24 and 13 is: 