The difference between 68 and 54 is: 
The difference between 90 and 70 is: 
The difference between 68 and 54 is: 
The difference between 68 and 57 is: 
The difference between 98 and 54 is: 
The difference between 68 and 34 is: 
The difference between 72 and 58 is: 
The difference between 68 and 54 is: 