The difference between 70 and 70 is: 
The difference between 39 and 13 is: 
The difference between 74 and 70 is: 
The difference between 70 and 70 is: 
The difference between 90 and 70 is: 
The difference between 70 and 30 is: 
The difference between 72 and 76 is: 
The difference between 70 and 70 is: 