1×1=1 (To Be One)
2017 debut EP by Wanna One

1×1=1 (To Be One) is the debut extended play by South Korean boy group Wanna One, a project group created through the 2017 Mnet survival show, Produce 101 Season 2, composed of eleven trainees from different entertainment companies that will promote for 18 months under YMC Entertainment. The album was released digitally and physically on August 7, 2017, by YMC Entertainment, Stone Music Entertainment and CJ E&M Music. A Japanese version of the album was released on September 27, 2017, through Pony Canyon. The album was re-released under the title 1−1=0 (Nothing Without You) on November 13, 2017.
Background and release
On June 16, 2017, the finalists in survival show Produce 101 Season 2 were revealed and the group immediately started preparations for their debut, starting with recording their own version of the song "It's Me (Pick Me)", "Always" (which was first released as final song for Top 20 finalists), and "Never". In addition, there are also 4 new songs to the album. Among these new songs, "Energetic" a song produced by Pentagon's Hui, which also composed "Never"; and "Burn It Up" were considered for the title track which would be decided by public votes. The album also included a fan-tribute pop song, titled "Wanna Be (My Baby)".
On September 28, 2017, YMC started releasing teasers of the repackaged edition of the album, titled 1−1=0 (Nothing Without You). The repackage serves as a prequel to their first album.
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