Munurin millum rættingarnar hjá "SI-prefiks"

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== Biner prefiks ==
Í teldutøkni er tað ofta praktiskari at hava prefiks fyri hvørji 2<sup>10</sup> = 1024 heldur enn hvørji 1000. Til tað endamálið eru [[Binert prefiks|biner prefiks]].
 
== Upprunalig prefiks v.m. ==
Tey upprunaligu prefiksini frá 1795 vóru:<ref>[http://histoire.du.metre.free.fr/en/Pages/Sommaire/06.htm The History of the Meter - The 7 April 1795 Act - Art. 6, 7 & 8]</ref>
Tey upprunaligu prefiksini frá 1795 vóru:<ref>[https://books.google.fr/books?id=8gVBAAAAcAAJ&pg=PA18&hl=fr#v=onepage&q&f=false Instructions sur les nouvelles mesures]</ref><ref>[http://histoire.du.metre.free.fr/en/Pages/Sommaire/06.htm The History of the Meter - The 7 April 1795 Act - Art. 6, 7 & 8]</ref> myria, kilo, hekto, deka, double, demi, desi, centi og milli; hesi kundu eisini setast saman, so t.d. millimilli merki millióntapartur, sum í 1873 fekk heitið mikro.</br>
{| class="wikitable" style="background:#FDFDFD"
Í reglugerð frá fronsku mynduleikunum tann 2. apríl 1919 eru prefiksini hesi:<ref>[https://gallica.bnf.fr/ark:/12148/bpt6k2208973/f2400.image Bulletin des lois de la République française]</ref> mega, hektokilo, myria, kilo, hekto, deka, desi, centi, milli, desimilli, centimilli og mikro.</br>
Tey dupultu prefiksini hava helst givið ov nógvar trupulleikar, í hvussu er vórðu tey sett úr gildi mitt í 20. øld.
{|
|
{| class="wikitable" style="background:#FDFDFD; line-height:17pt"
|- style="text-align: center; line-height: 30pt; background:#E8E8E8"
| colspan=7|<big>'''Upprunalig prefiks frá 1790'unum'''</big>
|- style="text-align: center; line-height: 22pt; background:#E8E8E8"
| <big>'''Prefiks'''</big>||colspan=4|<big>'''Tal'''</big>||colspan=2|<big>'''Orðauppruni'''</big>
|-
|[[milli]]||Túsundapartur|| ||10<sup>−3</sup>||0,001||''mille'', ''túsund''
|}
|&nbsp; &nbsp; &nbsp;||
{| class="wikitable" style="background:#FDFDFD; line-height:10pt"
|- style="text-align: center; line-height: 30pt; background:#E8E8E8"
| colspan=4|<big>'''Prefiks galdandi 1919'''</big>
|- style="text-align: center; line-height: 22pt; background:#E8E8E8"
| <big>'''Prefiks'''</big>||colspan=3|<big>'''Tal'''</big>
|- style="background:#F5F5F5; line-height:15pt"
|'''Heiti'''||'''Heiti'''||'''10<sup>n</sup>'''||'''Desimaltal'''
|-
|mega|| Millión||10<sup>6</sup>||style="text-align: right"|1&#8239;000&#8239;000
|-
|hektokilo||Hundraðtúsund||10<sup>5</sup>||style="text-align: right"|100&#8239;000
|-
|myria||[[Tíggjutúsund]]||10<sup>4</sup>||style="text-align: right"|10&#8239;000
|-
|kilo|| [[Túsund]]||10<sup>3</sup> ||style="text-align: right"|1&#8239;000
|-
|hekto|| [[Hundrað]]||10<sup>2</sup>||style="text-align: right"|100
|-
|deka||[[10 (tal)|Tíggju]]||10<sup>1</sup> ||style="text-align: right"|10
|- bgcolor="white"
| ||ein&#8239;/&#8239;eitt||10<sup>0</sup>||style="text-align: center"|1
|-
|desi||Tíggjundapartur||10<sup>-1</sup> || 0,1
|-
|centi|| Hundradapartur||10<sup>-2</sup>|| 0,01
|-
|milli||Túsundapartur||10<sup>−3</sup>||0,001
|-
|desimilli||Tíggjutúsundapartur||10<sup>−3</sup>||0,000&#8239;1
|-
|centimilli||Hundraðtúsundapartur||10<sup>−3</sup>||0,000&#8239;01
|-
|mikro||Millióntapartur||10<sup>−6</sup>||0,000&#8239;001
|}
|}
 
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