Not generally!<p><pre><code>    $ perl -E &#x27;say sprintf &quot;%.64f&quot;, 0.1 + 0.2&#x27;
    0.3000000000000000000108420217248550443400745280086994171142578125
    $ perl -E &#x27;say sprintf &quot;%.64f&quot;, 0.1 + 0.2 - 0.3&#x27;
    0.0000000000000000000000000000000000000000000000000000000000000000
</code></pre>
My Perl is configured with -Dusemorebits. <a href="https:&#x2F;&#x2F;metacpan.org&#x2F;pod&#x2F;distribution&#x2F;perl&#x2F;INSTALL#more-bits" rel="nofollow">https:&#x2F;&#x2F;metacpan.org&#x2F;pod&#x2F;distribution&#x2F;perl&#x2F;INSTALL#more-bits</a>