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HAVE A QUESTION? ASK IT HERE!

We are a group of experienced volunteers whose main goal is to help you by
answering your questions about math. To ask anything, just click here.


RECENT BLOG POSTS

 * Russian Peasant Multiplication: How and Why
 * Arithmetic with Roman Numerals
 * How Roman Numerals Work
 * Implicit Differentiation: What to Do When It’s “Wrong”
 * How to Think About the Product and Quotient Rules


BLOG ARCHIVE

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RECENT COMMENTS

 * Dave Peterson on Russian Peasant Multiplication: How and Why
 * Uncle Jim on Russian Peasant Multiplication: How and Why
 * Erika on Should We Put Zero Before a Decimal Point?
 * Dave Peterson on Implied Multiplication 3: You Can’t Prove It
 * Arithmetic with Roman Numerals – The Math Doctors on How Roman Numerals Work


ABOUT THIS SITE

The Math Doctors is run entirely by volunteers who love sharing their knowledge
of math with people of all ages. We have over 20 years of experience as a group,
and have earned the respect of educators. For some of our past history, see
About Ask Dr. Math. If you would like to volunteer or to contribute in other
ways, please contact us.


MATH QUESTIONS ANSWERED THOUGHTFULLY

For over twenty-five years, the Math Doctors have enjoyed answering questions at
Ask Dr. Math®, the question-and-answer service of The Math Forum. We have talked
about all aspects of math, from homework questions, to work-related practical
math, to “how” or “why” questions arising from curiosity or confusion.
Unfortunately, in late 2017 the site stopped taking questions – but we don’t
want to stop answering them! A group of us joined together to create this new
site as a way to continue our mission of mentoring anyone who writes to us, and
to move it up a level.

> Note: In January 2021, the Ask Dr. Math site to which we frequently refer was
> moved from mathforum.org and drmath.org to https://www.nctm.org/tmf/dr.math/.
> Subsequently, the NCTM has made it accessible only to their members, contrary
> to their 2017 announcement that “The archives of Dr. Math will remain freely
> available on this website for the foreseeable future.”
> 
> Update:
> 
> As of late June 2021, the Ask Dr. Math archives can be found at
> https://www.nctm.org/archives/dr.math/, which requires a free NCTM account.
> (If you are not a teacher, just pretend you are when you create the account.)
> 
> Until we change links on our site to the new locations, you can manually
> change an address like
> 
> http://mathforum.org/library/drmath/view/59206.html
> 
> to
> 
> https://www.nctm.org/archives/library/drmath/view/59206.html
> 
> in order to access it. That is, replace “http://mathforum.org” in the address
> bar with “https://www.nctm.org/archives”.
> 
> Unfortunately, it appears that there is currently no way to search the
> archives.

Unlike other free math help sites, we are not a public discussion board, where
anyone might answer your question (sometimes rudely or incorrectly), but a group
of dedicated volunteers who care about doing it right, answering your questions
privately and carefully. We then make the most generally useful discussions
available in an edited form for the benefit of the public (with private
information removed, of course). We want to provide a safe, comfortable
environment for anyone to ask questions: from preschool through grad school,
from basic arithmetic through college math, and from students, to parents, to
teachers, to workers. We strive to be encouraging, helpful, polite – and
correct. Teachers and students alike have trusted us for decades, and we are
committed to continuing that tradition.

Our members have years of experience, starting with an “internship” in which we
discussed our work with an experienced mentor (Dr. Ian, for many of us) who
passed on to us the culture of the Math Doctors – how to give just the right
amount of help rather than solving a problem for you, and how to interact
patiently no matter what kind of question you have or how awkwardly you ask it.

The Ask Dr. Math archive still provides access to the thousands of good
discussions that we archived under The Math Forum, out of hundreds of thousands
of questions we answered there. We encourage you to look there first if you have
a question, because there is a good chance we have already answered it. But
often reading is not enough; you need interaction with someone who understands
you. We’re here to give you whatever individual help you need. The blog plays
the role of archive for current questions.

To ask a new question, go to the Ask a Question page (the Doctors’ Office). No
registration is needed; just give us your name (it doesn’t have to be your full
name) and email (which will never be published, but is needed to send a reply),
and a little information about you (so we can have an idea of your level of
knowledge), and ask away! (Make sure the address you give us is valid, and that
our reply will not be treated as spam.)

Since our goal is not just to give you answers, but to help you learn to solve
problems for yourself, we need to see your work and hear what is giving you
trouble – just sending us a problem with no work will get you no more than a
hint of how to start. If your question is a general one rather than a specific
exercise, all the better – but even then, a specific example may help explain
what you are asking.

You can upload a picture or other document to help show the details of the
problem or your work. (But don’t rely on a picture to ask the entire question.)
When you submit the question, we will send you an acknowledgment email telling
you that we received it. When we reply, you will get another email. Follow the
link it provides, read our answer, and write back if necessary.

The blog is where we discuss publicly what we have learned from past or recent
conversations, adding value to the old archive and sharing insights from new
questions. Each week we plan to post an exploration of a topic that has been
dealt with in several ways over the years; there may also be a look at a
favorite old answer that we run across in the course of our work (Archive
Question of the Week), or an answer from recent months on this new site, to show
what we are currently doing (New Question of the Week). These posts will
introduce you to a wide variety of questions from the past and present, inviting
you to explore the archive with us, and perhaps provoking further questions from
you. Of course, feel free to respond to anything we write here, using the
Comment section. But if you have a question for further discussion, it will be
better to submit it as a new question, referencing the blog as needed.


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