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1+1 is a mathematical expression that evaluates to:

2 (number) (in ordinary arithmetic)
1 (number) (in Boolean algebra with a notation where '+' denotes a logical disjunction)
0 (number) (in Boolean algebra with a notation where '+' denotes 'exclusive or' operation, or in a quotient ring of numbers modulo 2)

The terms 1+1, One Plus One, or One and One may refer to:

1+1

1 + 1 + 1 + 1 + ⋯, a mathematical divergent series
1+1 (TV channel), a Ukrainian TV channel
1+1 (Grin album), 1972
1+1 (Herbie Hancock and Wayne Shorter album), 1997
"1+1" (song), by Beyoncé Knowles
"1+1", a 2021 song by Sia from Music
"1+1", a 2021 song by Pentagon from Love or Take

One Plus One

OnePlus One, an Android smartphone
One Plus One, original title of Jean-Luc Godard's 1968 film Sympathy for the Devil
One Plus One, 2002 graphic novel published by Oni Press
One Plus One (TV programme), a weekly interview show aired by ABC in Australia
Unomásuno (English: One Plus One), a Mexican newspaper

One and One

One and One (musical), an American 1970s off-Broadway musical comedy (also known as One & One)
One and One (song), written by Billy Steinberg, Rick Nowels and Marie-Claire D'Ubaldo and notably covered by Robert Miles feat. Maria Nayler
"One and One (Ain't I Good Enough)", a 1987 song by Wa Wa Nee
One-and-one, a type of free throw in basketball
Fish and chips, in Dublin slang

Other

1&1 AG, a German telecom company
1 and 1 (SHINee album), a 2016 reissue of their album 1 of 1

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+{{pp-protected|reason=Persistent [[WP:Disruptive editing|vandalism/disruptive editing]]|expiry=indefinite|small=yes}}
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-<!--*************************************************************************************************************************************************
-ATTENTION ALL REGISTERED AND UNREGISTERED EDITORS - WHAT 1 + 1 IS, IT IS NOT A JOKE! IT IS NOT EQUAL TO ANYTHING OTHER THAN WHAT IS LISTED BELOW. DO NOT CREATE HOAXES OR POKE FUN AT WHAT 1 + 1 IS. YOU WILL BE BLOCKED IF YOU KEEP TRYING. THANK YOU!
-**************************************************************************************************************************************************-->
 '''1+1''' is a mathematical expression that evaluates to:
-* [[2 (number)]] (in ordinary [[arithmetic]])
+* [[2 (number)]] (in ordinary arithmetic)
-* [[1 (number)]] (in [[Boolean algebra]] with a notation where '+' denotes a [[logical disjunction]], see [[logical disjunction#Definition]])
+* [[1 (number)]] (in Boolean algebra with a notation where '+' denotes a logical disjunction)
-* [[0 (number)]] (in Boolean algebra with a notation where '+' denotes '[[exclusive or]]' operation, see [[Boolean algebra#Values]], or in a [[quotient ring]] of numbers [[modular arithmetic|modulo 2]])
+* [[0 (number)]] (in Boolean algebra with a notation where '+' denotes 'exclusive or' operation, or in a quotient ring of numbers modulo 2)
 The terms '''1+1''', '''One Plus One''', or '''One and One''' may refer to:
@@ Line 13: / Line 10: @@
 == 1+1 ==
 *[[1 + 1 + 1 + 1 + ⋯]], a mathematical divergent series
-*[[1+1 (channel)]], a Ukrainian TV channel
+*[[1+1 (TV channel)]], a Ukrainian TV channel
-*[[1+1 (album)]], a 1972 album by Grin
+*[[1+1 (Grin album)|''1+1'' (Grin album)]], 1972
-*[[1 + 1 (album)]], a 1997 duet album by Herbie Hancock and Wayne Shorter
+*[[1+1 (Herbie Hancock and Wayne Shorter album)|''1+1'' (Herbie Hancock and Wayne Shorter album)]], 1997
-*[[1+1 (song)]], by Beyoncé Knowles
+*[[1+1 (song)|"1+1" (song)]], by Beyoncé Knowles
+*"1+1", a 2021 song by Sia from [[Music – Songs from and Inspired by the Motion Picture|''Music'']]
+*"1+1", a 2021 song by Pentagon from ''[[Love or Take]]''
 == One Plus One ==
 *[[OnePlus One]], an Android smartphone
-*''One Plus One'', original title of ''[[Sympathy for the Devil (film)]]''
+*''One Plus One'', original title of Jean-Luc Godard's 1968 film ''[[Sympathy for the Devil (1968 film)|Sympathy for the Devil]]''
-*''[[List of Oni Press publications#C|One Plus One]]'', 2002 graphic novel published by Oni Press
+*''One Plus One'', 2002 graphic novel [[List of Oni Press publications#O|published by Oni Press]]
+*[[One Plus One (TV program)|''One Plus One'' (TV programme)]], a weekly interview show aired by ABC in Australia
-*''OnePlusOne'', (Marriage and Partnership Research) founded in 1970 by Dr Jack Dominian
+*''[[Unomásuno]]'' (English: One Plus One), a Mexican newspaper
 ==One and One==
-* [[One and One (musical)]]
+* [[One and One (musical)]], an American 1970s off-Broadway musical comedy (also known as ''One & One'')
+* [[One and One (song)]], written by Billy Steinberg, Rick Nowels and Marie-Claire D'Ubaldo and notably covered by Robert Miles feat. Maria Nayler
-* [[One and One (song)]]
+* "[[One and One (Ain't I Good Enough)]]", a 1987 song by Wa Wa Nee
-* A type of [[free throw]] in [[basketball]]
+* One-and-one, a type of [[free throw]] in basketball
-<!--* "One and one" in [[basketball]], a situation in which a team is give a [[free throw]] opportunity when the opposing team has accrued a certain number of fouls within a half. The free throw shooter is given one attempt, and if that shot is good, another attempt is given. In [[college basketball|college]] and [[high school]] basketball in the [[United States]], this opportunity is given when the fouling team has seven, eight or nine fouls in a half. (From ten fouls onward, the free throw shooter has two attempts, no matter what.) This situation is also referred to as "the bonus" or "one and bonus."-->
-* Dublin slang for a serving of [[fish and chips]]
+* [[Fish and chips]], in Dublin slang
 ==Other==
+* [[1&1 AG]], a German telecom company
-* [[One & One (musical comedy)]] - an original [[off-Broadway]] [[musical comedy]] by Dianne Adams (music and lyrics) Fred Bennett (book), and [[Richard O’Donnell]] (book, music and lyrics).
+* [[1 and 1 (SHINee album)|''1 and 1'' (SHINee album)]], a 2016 reissue of their album ''1 of 1''
-* [[1&1 Internet]], a web hosting company
 ==See also==
 * [[One and One Is One (disambiguation)]]
-* [[One Plus One Is One]] (2004 album), album by Badly Drawn Boy
+* ''[[One Plus One Is One]]'', a 2004 album by Badly Drawn Boy
+* [[One on One (disambiguation)]]
+* [[One by One (disambiguation)]]
-{{disambiguation}}
+{{numberdis}}