The difference between 60 and 45 is: 
The difference between 87 and 79 is: 
The difference between 66 and 45 is: 
The difference between 60 and 40 is: 
The difference between 70 and 45 is: 
The difference between 60 and 45 is: 
The difference between 67 and 42 is: 
The difference between 60 and 45 is: 