The difference between 90 and 48 is: 
The difference between 51 and 29 is: 
The difference between 99 and 48 is: 
The difference between 90 and 40 is: 
The difference between 60 and 48 is: 
The difference between 90 and 28 is: 
The difference between 96 and 44 is: 
The difference between 90 and 48 is: 