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I have been looking for a latex feature which can show operations in a columnwise fashion. For example:-

If I would want to show $19 * 5$ to a $1$st grader, I would love to show it like this :-

$1 9$

x $5$

__

$9 5$

Now obviously this isn't latexed and it looks ugly like this. I have searched for this feature in MathJax basic tutorial and quick reference, but I couldn't find it.

So is there a way to express this multiplication, or any operation in a column wise way?

I would appreciate if someone could tell me a way which also takes letters instead of numbers. I would be able to use them in cryptarithmetic puzzles.

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    $\begingroup$ There is a tex.stackexchange $\endgroup$ Commented Apr 9, 2023 at 11:40
  • $\begingroup$ @GerryMyerson Could u send the link for the page? $\endgroup$
    – Anonymous
    Commented Apr 9, 2023 at 11:51
  • $\begingroup$ tex.stackexchange.com $\endgroup$ Commented Apr 9, 2023 at 12:06
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    $\begingroup$ @GerryMyerson I meant do you have the question or the answer which discusses the feature I am looking for? $\endgroup$
    – Anonymous
    Commented Apr 9, 2023 at 12:11
  • $\begingroup$ What comes to mind is the array environment in MathJax. $\endgroup$
    – hardmath
    Commented Apr 9, 2023 at 12:13
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    $\begingroup$ And I meant that there is a website where questions about TeX and LaTeX are not off-topic. $\endgroup$ Commented Apr 9, 2023 at 12:40

2 Answers 2

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It's a pain, but it can be done using the array environment. https://math.stackexchange.com/a/1087946/25554 has an example:

$$\require{enclose}\begin{array}{rlll} & \ \ \ \,0.1\\ 17&\enclose{longdiv}{3.000\ldots} \\ & \ \ 1.7 \\ \hline & \ \ 1\ 3 \end{array}$$

$$\begin{array}{rlll} & \ \ \ \,0.17\\ 17&\enclose{longdiv}{3.000\ldots} \\ & \ \ 1.7 \\ \hline & \ \ 1\ 30 \\ & \ \ 1\ 19 \\ \hline & \ \ \ \ \ 11 \end{array}$$

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  • $\begingroup$ Thank you, the second answer gives the way to include the symbol. $\endgroup$
    – Anonymous
    Commented Apr 10, 2023 at 2:25
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$ \begin{array}{rr} & 19 \\ \times &5 \\ \hline &95 \end{array} $

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  • $\begingroup$ Thanks a lot, this was exactly what I needed. $\endgroup$
    – Anonymous
    Commented Apr 10, 2023 at 2:25

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