1 lb = 16 oz
Translating the unit into oz gives us 
166oz - 123oz = 43oz or 2lb 11oz
        
             
        
        
        
It would be 8 + 40 because you multiply the 4 by the 2 and 10
        
             
        
        
        
The forth picture is the one that represents 4.5
        
                    
             
        
        
        
Answer:
SORRY I don't know second number . I did only first .
 
        
             
        
        
        
Answer:
Step-by-step explanation: it is negative 42 it is just the opposite cause the thumbs is down negative up positive