SAT Math

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  1. Integers
    Positive and negative whole numbers, and zero. NOT fractions or decimals
  2. Prime Number
    • An integer that has exactly two distinct factors:
    • Itself and 1. All prime numbers are positiv; the smallest prime number is 2.
    • One is not a prime!
  3. Rational Numbers
    • rationale Zahlen
    • e.g. (1/3); 2; -3 ...
    • (not: e, pi, square 2)
  4. Irrational Numbers
    • Not rational!
    • Does not repeat, has no end.
    • e.g.: e, pi, square(2)
  5. Real Numbers
    All numbers, except imaginary numbers
  6. Imaginarz Numbers
    e.g.: square(-1)
  7. Consecutive Numbers
    • The members of a set listed in order, without skipping any.
    • Consecutive Numbers: -3, -2, -1, 0, 1, 2...
    • Consecutive positive multiples of 3: 3,6,9,12,...
  8. Distinct Numbers
    Numbers that are different from each other
  9. Sum
    +
  10. Difference
    -
  11. Product
    x
  12. Quotient
    /
  13. Remainder
    • The integer left over after dividing, two numbers.
    • e.g. 17/2, remainder is 1.
    • Remember: on the Math Subject Test, a remainder is ALWAYS an integer!!!
  14. Reciprocal
    "Kehrwert"
  15. Positive Difference
    smaller - bigger number.
  16. Absolute Value
    "Betrag"
  17. Arithmetic Mean
    average
  18. Median
    Median
  19. Mode
    The value that occurs most often in a list. If no value appears more often than all the others in a list, then that has no mode.
  20. Factors
    • Factors of an integer, are all the integers that can divide the integer.
    • factors are smaller then the number itself
  21. Prime Factors
    • e.g.
    • 8= 2*2*2
    • 75= 5*5*3
  22. Multiples
    • The multiples of a number are all the numbers that are evenly divisible by your original number.
    • smallest multiple of a is a!
    • "postive integer multiples of 6" = 1 x 6, 2 x 6, 3 x 6, ...

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Author:
Anonymous
ID:
38930
Filename:
SAT Math
Updated:
2010-10-01 13:29:09
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SAT Math
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to lern for math sat
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