The difference between 87 and 42 is: 
The difference between 90 and 15 is: 
The difference between 84 and 42 is: 
The difference between 87 and 44 is: 
The difference between 57 and 42 is: 
The difference between 87 and 32 is: 
The difference between 94 and 49 is: 
The difference between 87 and 42 is: 