Posted by **taylor** on Sunday, January 8, 2012 at 9:36am.

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**, Sunday, January 8, 2012 at 11:31am
Please help me i really need help before school help me

- math -
**Reiny**, Sunday, January 8, 2012 at 11:49am
Taylor, you are probably just taking 65-7 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 5-1 I get only 4.

so that is why I had to add 1 to the subtraction answer.

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