# Algebra 2 Terms

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1. opposite
positive and negative numbers (ex. 5, -5)
2. reciprocal
flips number over (1/4, 4/1)
3. rational number
can be written as a fraction
4. irrational number
• can't be written as a fraction (pi, square root of 2, e)
• a decimal that never ends and never repeats
5. whole numbers
counting numbers (NOT negative, but includes 0)
6. integers
positive and negative whole numbers (number line)
7. closure property
addition: a + b = real number

multiplication: ab = real number
8. commutative property
addition: a + b = b + a

multiplication: ab = ba
9. associative
addition: (a + b) + c = a + (b + c)

multiplication: (ab)c = a(bc)
10. identity
addition: a + 0 = 0 + a

multiplication: a x 1 = a, 1 x a = a
11. inverse
addition: a + (-a) = 0

multiplication: a x 1/a = 1 , a = 0
12. distributive
a (b + c) = ab + ac
 Author: laurettaloo22 ID: 33522 Card Set: Algebra 2 Terms Updated: 2010-09-08 23:37:53 Tags: Algebra Terms Folders: Description: Algebra 2 - chapter 1 section 1 Show Answers: