Inverse Properties

March 28, 2008 at 1:59 pm | In Module 4, Vocabulary, algebra | Leave a Comment

Inverse Property of Addition
The inverse property of addition says that if you add a number and its opposite, the sum is 0.

For example:    (-6) + 6 = 0 or 2x + (-2x) = 0
In general:  a + (-a) = 0 or (-a) + a = 0

Inverse Property of Multiplication
The inverse property of multiplications says that if you multiply a number and its multiplicative inverse, the product is 1.

For example: (8)(1/8) = 1 or (3/4)(4/3) = 1
In general:  a(1/a) = 1 or (1/a)(a) = 1

Module 2 – Key Vocabulary

March 15, 2008 at 2:23 am | In Module 2, Vocabulary | Leave a Comment

Key Vocabulary

  • integer
  • operations
    • sum
    • difference
    • product
    • quotient
  • positive
  • negative
  • absolute value

ABSOLUTE VALUE: (Informal) A number’s distance from zero.  (Formal) The absolute value of a number a is the distance between zero and a on a number line. The symbol |a| represents the absolute value of a.

(References) http://en.wikipedia.org/wiki/Absolute_value  http://www.purplemath.com/modules/absolute.htm

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