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英文字典中文字典相关资料:


  • List of mathematical symbols - Simple English Wikipedia, the . . .
    Plus-minus plus or minus x±y means both x+y and x-y 1±2 represents both 3 and -1 ∞ is a symbol used to represent unending amounts ∞ + x = ∞
  • Where and When Did the Symbols + and ndash; Originate?
    The first appearance of + and – in English was in the 1551 book on algebra The Whetstone of Witte by the Oxford mathematician Robert Recorde, who also introduced the equal sign as the rather longer than today's symbol "═ " In describing the plus and minus signs Recorde wrote: "There be other 2 signes in often use of which the first is made
  • The Surprisingly Short History Of The Plus Sign - Fast Company
    The plus sign, originally a shorthand for the Latin word for “and,” et, came about in the late 15th century And intuitive though it seems now, it wasn’t easily adopted: It took another
  • Addition - Wikipedia
    Addition (usually signified by the plus symbol, +) is one of the four basic operations of arithmetic, the other three being subtraction, multiplication, and division The addition of two whole numbers results in the total or sum of those values combined For example, the adjacent image shows two columns of apples, one with three apples and the
  • Glossary of mathematical symbols - Wikipedia
    ± (plus–minus sign) 1 Denotes either a plus sign or a minus sign 2 Denotes the range of values that a measured quantity may have; for example, 10 ± 2 denotes an unknown value that lies between 8 and 12 ∓ (minus-plus sign) Used paired with ±, denotes the opposite sign; that is, + if ± is −, and − if ± is +
  • List of typographical symbols and punctuation marks - Wikipedia
    Paragraph mark, paragraph sign, paraph, alinea, or blind P: Section sign ('Silcrow') ⌑ Pillow (non-Unicode name) 'Pillow' is an informal nick-name for the 'Square lozenge' in the travel industry The generic currency sign is superficially similar | Pipe (non-Unicode name) (Unicode name is "vertical bar") + Plus sign: minus sign, ampersand: ±





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