The difference between 99 and 30 is: 
The difference between 48 and 36 is: 
The difference between 91 and 30 is: 
The difference between 99 and 37 is: 
The difference between 79 and 30 is: 
The difference between 99 and 70 is: 
The difference between 101 and 32 is: 
The difference between 99 and 30 is: 