## WeBWorK Problems

### formatted answer blank in a tex fraction

by John Travis -
Number of replies: 3
I am currently struggling with creating easy-to-understand and simple pre-algebra problems and currently want to have the student complete a ratio expression of the form:

a/b = c/d

where c is the answer blank.  Of course if the formatting is as above then things are easy.  Instead, I'd like to use \frac{ ans_rule(2) }{$d} for the right hand side. I know I can use multianswer.pl but that seems to be overkill. Is there some quick way to embed a single answer blank into a tex formatted question using MathJax? I've tried tex_ans_rule and this gives http://math.mc.edu/webwork2/PreAlgebra/C06-S02-Proportions/3/ Thanks, JT In reply to John Travis ### Re: formatted answer blank in a tex fraction by Arnold Pizer - Hi John, Not sure about MathJax but this won't work in images mode. Do you want to write a problem that is mode dependent? Arnie In reply to Arnold Pizer ### Re: formatted answer blank in a tex fraction by John Travis - No. But wanted to find some way to make the problem simpler to read and answer. Trying to avoid the "here's the question, now put the answer there" approach. However I think the following using ColumnTable does the trick...stolen from the parserMultianswer.pl examples...$exp = ColumnTable(
"$$\displaystyle \frac{a}{b} =$$",ans_rule(2).$BR.$HR.d, indent => 0, separation => 10, valign => "MIDDLE" ); I'd like to make the formatting ofd fit the rest of the stuff but this is the general idea.

JT

### Re: formatted answer blank in a tex fraction

by Davide Cervone -
This gives a somewhat more pleasing layout, and should work better in hardcopy mode.
    loadMacros("unionTables.pl");

$LINE = MODES( TeX => '\hrulefill ', HTML => '<hr size="1" style="border-style: solid; margin:1px 0 5px 0">', );$exp = BeginTable() .
AlignedRow([ans_rule(2)]) .
AlignedRow([$LINE]) . AlignedRow(["$$d$$"]) . EndTable();$exp = BeginTable() .
Row(["$$\displaystyle\frac{a}{b} =$$",\$exp],separation=>8) .
EndTable();


Hope that helps.

Davide