Posted by taylor on .
bernie began building a model airlane on day 7 of his summer vacation and finished building it on day 65. he worked on the plane each day. how many days did it take?

math 
taylor,
Please help me i really need help before school help me

math 
Reiny,
Taylor, you are probably just taking 657 and get 58
, but that would not count day 7,
So there are 59 days.
Looks at a simpler case:
How many days from June 1 to june 5
obviously there are 5 days, but ...
when I take 51 I get only 4.
so that is why I had to add 1 to the subtraction answer.