The difference between 90 and 29 is: 
The difference between 84 and 20 is: 
The difference between 99 and 29 is: 
The difference between 90 and 20 is: 
The difference between 70 and 29 is: 
The difference between 90 and 49 is: 
The difference between 98 and 27 is: 
The difference between 90 and 29 is: 