Ubuntu 18.04lts - cannot find bcmath package

[techlists at phpcoderusa.com]

Hi, 

Setting up a test server for Magento 2.  Requires bcmath.  I can find no
such package. 

I am on Ubuntu 18.04lts that has PHP 7.2.10-0ubuntu0.18.04.1 installed. 

Tried using apt-cache pkgnames Bcmath and apt-cache pkgnames
php7.2-bcmath , both return to the prompt w/o any feedback.   

Been searching the web to no avail..... 

Any suggestions appreciated. 

Thanks!! 

Keith
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