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Re: On Regents Exam
Posted:
May 4, 2011 10:18 AM
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Many years ago (Course 3!) I had students round to the 4th place and told
them that should cover it. I was wrong. Many lost 1 point. Since then, we
hold the full display of the calculator.
On Wed, May 4, 2011 at 8:32 AM, Daniel Knaisch <
dknaisch@elmiracityschools.com> wrote:
> From my experience, students are lazy and when they see the calculator spit
> out a decimal that is 8 or 9 places long, you start hearing the moaning and
> complaining that they have to use them all (even from the best students).
> This is a battle that you just won't win, so I have always told them to
> round to 4 decimal places no matter what. Going back to the "old days" when
> we used trig tables (some of you young bucks won't remember), but all of the
> decimals were rounded to 4 places. I have never come across a problem where
> rounding was skewed becasue of using only 4-decimals
>
> Daniel Knaisch
> Math Teacher
> Elmira Free Academy
> 933 Hoffman St.
> Elmira, NY 14905
> (607)735-3100 ext 4233
> ________________________________________
> From: owner-nyshsmath@mathforum.org [owner-nyshsmath@mathforum.org] On
> Behalf Of mathpig [mirie@northvillecsd.k12.ny.us]
> Sent: Tuesday, May 03, 2011 6:45 PM
> To: nyshsmath@mathforum.org
> Subject: On Regents Exam
>
> There is a question using both the law of Sines and Cosines, and first
> you solve for a side and use it to find an angle. Say the side is an
> irrational number (ex. 10.254873209). Can a student round it to say the
> nearest hundredth and use it to solve an angle OR should a student use the
> 10.254873209 to solve the angle?
>
> I have always taught students to use the number and not to round it until
> the end (the answer) but just wondered if that is allowed.
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