olemus
positsioonilises arvusüsteemis:
(a) null, millele arvus ei järgne mittenulle
(b) vormingutäiteline null murdosa viimase mittenulli järel
= in the positional number system: (a) a zero not followed by a non-zero in the number (b) a format-filling zero after the last non-zero in the fraction part

ülevaateid
https://en.wikipedia.org/wiki/Trailing_zero
https://ccnmtl.columbia.edu/projects/mmt/frontiers/web/chapter_5/6665.html
https://www.yourstatsguru.com/teaching/significant-figures-and-scientific-notation/