10 
Step-by-step explanation:
 first what is 10 take away 2 is 8 then 10 take away 2 is 8 + 2 equals 10 8 + 2 equals 10 so that's how I got the answer 10 
 
        
             
        
        
        
Answer:
35 + 37
Step-by-step explanation:
if you try any other number like: 37 + 39 = 76 that doesn't work well because its higher that 75. 
 
        
             
        
        
        
Answer:
Step-by-step explanation:
52units