The difference between 37 and 29 is: 
The difference between 79 and 67 is: 
The difference between 39 and 29 is: 
The difference between 37 and 26 is: 
The difference between 87 and 29 is: 
The difference between 37 and 19 is: 
The difference between 39 and 21 is: 
The difference between 37 and 29 is: 