The missing operations in order is division, division, subtraction, addition, addition, and division
        
             
        
        
        
350 ÷ 6 = 58.33 
58.33 pounds of chocolate per hour
58.33 × 10 = 583.3
583.33 pounds of chocolate in 10 hours
 
        
                    
             
        
        
        
I don't know the answer I'm just answering some thing so that Brinley will let me ask a question. Hope this helps LOL
        
             
        
        
        
So if John gives a pen and pencil to each and all of them are over we know that the no. of pencils and pens should be the same
So we will find the LCM of 15 and 40 that is equal to 120
So John brought 120/15 that is 8 packets of pen and 120/40 that is three packets of pencils