Split of Oolong Tea
－の由来：船乗りが樽の入った水が減るたびにつけていた横線の印
＋の由来：その横線のついた樽に中身を追加する時縦線を加えて取り消したから
×の由来：十字架を斜めにした。なぜこれをかけるの記号にしたのかは定かではない。
÷の由来：分数を記号化したもの
＝の由来：二線間の距離が等しい平行線を意味していることから。
“
—

物理・数学で面白い雑学教えて:哲学ニュースnwk (via otsune)

+はラテン語の“et”を流して書いたのが由来じゃなかったのか
Reblogged 5 months ago from lemp3 (Originally from otsune)
329 notes
Source: blog.livedoor.jp
  1. da-mu6 reblogged this from damnlocks
  2. prawn reblogged this from andi-b
  3. textfs reblogged this from comsmet
  4. alabasterkeg reblogged this from lunabahamut
  5. c610 reblogged this from mooncroix
  6. memo-joukou reblogged this from flood
  7. kitatuba reblogged this from shibats
  8. tensai-tensai reblogged this from inumoto
  9. mooncroix reblogged this from tanakamp
  10. oolong23 reblogged this from lemp3 and added:
    +はラテン語の“et”を流して書いたのが由来じゃなかったのか
  11. megumu226 reblogged this from charzred
  12. htti reblogged this from charzred
  13. no-theme reblogged this from edieelee
  14. 2-4-6 reblogged this from junkplus
  15. charzred reblogged this from tanakamp
  16. kaiilliakai reblogged this from futureisfailed
  17. alblem reblogged this from otsune
  18. comsmet reblogged this from bibidebabideboo
  19. yellow-label-tea reblogged this from jabberokkie
  20. lemp3 reblogged this from tiga
  21. gkojax-text reblogged this from shrineroof
  22. textm reblogged this from bibidebabideboo
  23. kumohamiz reblogged this from bibidebabideboo
  24. bibidebabideboo reblogged this from andi-b
  25. sntkny reblogged this from piyorisa
  26. alio2nd reblogged this from otsune
  27. con-limon reblogged this from wwwwwwwwwwww123
  28. shibats reblogged this from ringring2
  29. shokaku reblogged this from dotnuke
  30. eroticegg reblogged this from himmelkei
  31. himmelkei reblogged this from rarihoma
  32. nobeee reblogged this from otsune
  33. koris1974 reblogged this from tiga
  34. tenome reblogged this from otsune
  35. wwwwwwwwwwww123 reblogged this from tanakamp
  36. yoshimuraspeed reblogged this from littlerodem
  37. uz96 reblogged this from wayayaya
  38. littlerodem reblogged this from wayayaya
  39. tuttun reblogged this from sierra7
  40. 4percent-pantomime reblogged this from andi-b