The difference between 70 and 20 is: 
The difference between 85 and 44 is: 
The difference between 72 and 20 is: 
The difference between 70 and 20 is: 
The difference between 90 and 20 is: 
The difference between 70 and 50 is: 
The difference between 73 and 28 is: 
The difference between 70 and 20 is: 