unit fractions
... that exercises in the fair division of food are often used to teach unit fractions?
... that exercises in the <a href="./Fair_division" id="mwAYI" rel="mw:WikiLink" title="Fair division">fair division</a> of food <i id="mwAYM">(example pictured)</i> are often used to teach <b id="mwAYQ"><a href="./Unit_fraction" id="mwAYU" rel="mw:WikiLink" title="Unit fraction">unit fractions</a></b>?