The difference between 70 and 50 is: 
The difference between 90 and 56 is: 
The difference between 79 and 50 is: 
The difference between 70 and 50 is: 
The difference between 80 and 50 is: 
The difference between 70 and 60 is: 
The difference between 77 and 58 is: 
The difference between 70 and 50 is: 