The difference between 68 and 30 is: 
The difference between 84 and 56 is: 
The difference between 62 and 30 is: 
The difference between 68 and 31 is: 
The difference between 98 and 30 is: 
The difference between 68 and 50 is: 
The difference between 75 and 37 is: 
The difference between 68 and 30 is: 