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[GRE] GRE数学符号和常用的数学表达方式 [复制链接] qrcode

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十月妈妈
发表于: 2010-1-14 21:20:47 | 显示全部楼层

GRE/GMAT数学符号和常用的数学表达方式  数学试题中常用的数学符号总结如下:
  SYMBOL MEANING
      =   is equal to
      ≠   is not equal to
      ≈   is approximately equal to
      >   is greater than
      ≥   is greater than or equal to
      <   is less than
      ≤   is less than or equal to
          square root
      0.8 the repeating decimal 0.888…
      r s't“ r degrees s minutes t seconds
      ∠   angle
      right angle
      ┻   is perpendicular
      │x│  absolute value of x
      ∥   is parallel to
      △   triangle
      ~   is similar to
      ≌   is congruent to
      △x   delta x
      AB   arc  AB
      π   pi(3.1415…)
     1.is equal to; is the same as
                         =
     the result is; yields; gives
     2.the sum of x and y; the total of x and y;
      x added to y; x increased by y;          x+y
      x more then y; x greater than y
  3.x minus y; x less y;
    the difference of x and y; x take away y;
    from x subtract y' x decreased by y;         x-y
    x diminished by y; y is subtracted from x;
    y less than x (note the reversal)
  4. x multiplied by y;
                                xy
    the product of x and y;
  5. divided by y;
    the quotient of x and y;                x y,
    y divided into x (note the reversal)
  6. A and B are factors of C;
    A and B are divisors of C;
    C is divisible by A and by B;            A B=C
    C is a multiple of A and of B;
    A divides C and B divides C;
  7. the ratio of a to b                   a:b,
  8. reciprocal of                      x
  9. x times as many z as y;                z=x y
  10. a squared;
     a to the second power                 a2
  11. a cubed;                         a3
    a to the third power
  12. between a and b                   (a,b)
    between a and b, inclusive             [a,b]
  13. off                     低于,从……中扣除
  14. account for                     占
  15. third
  16. of x (a fraction of x);              x,0.75x
                           75% of x (a percent of x)
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