Hilingon an source kan Pag-ina

[[File:Subtraction01.svg|right|thumb|225x225px|"{{nowrap|5 − 2}} = 3" (sa pagtaram, "lima pig-inaan nin duwa iyo minatao nin tolo")]]

An '''pag-ina''', '''pagbawas''' o '''subtraksyon''' ([[Ingles]]: ''subtraction'') iyo sarong [[Aritmetika|aritmetikong]] operasyon na pigrerepresenta an operasyon kan paghali nin sarong bagay gikan sa sarong koleksyon. An subtraksyon iyo may senyales na ''minus'', {{char|−}}. 

Halimbawa, sa kataid na ladawan, igwa nin {{nowrap|5 − 2}} na melokoton—boot-sabihon 5 na melokoton kun sain an duwa iyo pighali, na nagresulta sa total na 3 na melokoton. Kaya, an diperensya kan 5 asin 2 iyo 3; na iyo, {{nowrap|1=5 − 2 = 3}}. Maski ngani pangenot na pigaasosyar sa mga natural na [[numero]] sa aritmetika, an subtraksyon pwede man magrepresenta nin paghali o pagbaba nin pisikal asin abstraktong kantidad gamit an manlainlain na klase nin mga bagay kabali an mga negatibong numero, [[praksyon]], irasyonal na numero, [[bektor]], [[desimal]], function, asin matrix.<ref>{{Cite web|date=2020-03-25|title=Comprehensive List of Algebra Symbols|url=https://mathvault.ca/hub/higher-math/math-symbols/algebra-symbols/|access-date=2020-08-26|website=Math Vault|language=en-US}}</ref><ref name=":0">{{Cite web|last=Weisstein|first=Eric W.|title=Subtraction|url=https://mathworld.wolfram.com/Subtraction.html|access-date=2020-08-26|website=mathworld.wolfram.com|language=en}}</ref>

== Paggamit ==
Kun mas halangkaw an enot na numero iyo magigin positibo an resultang numero.

Halimbawa:

:<math>45 - 36 = 9\,</math>
Pero sa kabaliktaran, kun sain naenot an sadit na numero iyo dapat lalaagan nin kurit sa enotan an resultang numero na an boot-sabihon iyo negatibong numero.

Halimbawa:

:<math>3 - 9 = -6</math>

==Mga panluwas na takod==
{{Commons category|Subtraction|Pag-ina}}
* {{springer|title=Subtraction|id=p/s091050}}
* Printable Worksheets: [https://web.archive.org/web/20121119024904/http://www.math-drills.com/subtraction.shtml Subtraction Worksheets], [http://www.kwiznet.com/p/takeQuiz.php?ChapterID=1214&CurriculumID=2&Method=Worksheet&NQ=24&NQ4P=3 One Digit Subtraction], [http://www.kwiznet.com/p/takeQuiz.php?ChapterID=1202&CurriculumID=2&Method=Worksheet&NQ=24&NQ4P=3 Two Digit Subtraction], [http://www.kwiznet.com/p/takeQuiz.php?ChapterID=1273&CurriculumID=3&Method=Worksheet&NQ=24&NQ4P=3 Four Digit Subtraction], asin [http://www.dadsworksheets.com/worksheets/subtraction.html More Subtraction Worksheets]
* [http://www.cut-the-knot.org/Curriculum/Arithmetic/SubtractionGame.shtml Subtraction Game] sa ''cut-the-knot''
* [https://web.archive.org/web/20090416010325/http://webhome.idirect.com/~totton/abacus/pages.htm#Subtraction1 Subtraction on a Japanese abacus] napili gikan sa [http://webhome.idirect.com/~totton/abacus/ Abacus: Mystery of the Bead]

== Toltolan ==
{{reflist}}
{{Elementary arithmetic}}
{{matematika-tamboan}}
[[Kategorya:Aritmetika]]