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GRE数学符号和常用的数学表达方式

wwlcj1982 于2007-07-24发布 l 已有人阅读

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       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 

  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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