Plus-minus sign facts for kids

Kids Encyclopedia Facts
±
Plus-minus sign
Minus-plus
Punctuation
apostrophe   '
brackets [ ]  ( )  { }  ⟨ ⟩
colon :
comma ,  ،  
dash ‒  –  —  ―
ellipsis   ...  . . .      
exclamation mark  !
full stop, period .
guillemets ‹ ›  « »
hyphen
hyphen-minus -
question mark  ?
quotation marks ‘ ’  “ ”  ' '  " "
semicolon ;
slash, stroke, solidus /    
Word dividers
interpunct ·
space     
General typography
ampersand &
asterisk *
at sign @
backslash \
basis point
bullet
caret ^
dagger † ‡ ⹋
degree °
ditto mark ” 〃
equals sign =
inverted exclamation mark ¡
inverted question mark ¿
komejirushi, kome, reference mark
multiplication sign ×
number sign, pound, hash #
numero sign
obelus ÷
ordinal indicator º ª
percent, per mil  % ‰
pilcrow
plus, minus + −
plus-minus, minus-plus ± ∓
prime     
section sign §
tilde ~
underscore, understrike _
vertical bar, pipe, broken bar |    ¦
Intellectual property
copyright ©
copyleft 🄯
sound-recording copyright
registered trademark ®
service mark
trademark
Currency
currency sign ¤

؋ ​₳ ​ ฿ ​ ​ ₵ ​¢ ​₢ ​ $ ​₫ ​₯ ​֏ ​ ₠ ​ ​ ƒ ​₣ ​ ₲ ​ ₴ ​ ₭ ​ ₺ ​₾ ​ ​ ₦ ​ ₧ ​₱ ​₰ ​£ ​ 元 圆 圓 ​៛ ​₽ ​₹ ₨ ​ ₪ ​ ​₸ ​₮ ​ ₩ ​ ¥ ​

Uncommon typography
asterism
fleuron, hedera
index, fist
interrobang
irony punctuation
lozenge
tie
Related
In other scripts
  • Chinese
  • Hebrew
  • Japanese
  • Korean
  • Category
  • Book

The plus-minus sign (±) is a mathematical symbol with multiple meanings.

  • In mathematics, it generally indicates a choice of exactly two possible values, one of which is the negation of the other.
  • In experimental sciences, the sign commonly indicates the confidence interval or error in a measurement, often the standard deviation or standard error. The sign may also represent an inclusive range of values that a reading might have.
  • In engineering the sign indicates the tolerance, which is the range of values that are considered to be acceptable, safe, or which comply with some standard, or with a contract.
  • In botany it is used in morphological descriptions to notate "more or less".
  • In chemistry the sign is used to indicate a racemic mixture.
  • In chess, the sign indicates a clear advantage for the white player; the complementary sign ∓ indicates the same advantage for the black player.

The sign is normally pronounced "plus or minus" or "plus-minus".


Plus-minus sign Facts for Kids. Kiddle Encyclopedia.