Unit 1 Alg. II Test SAT Packet

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Algebra

12 Terms

1

Natural numbers

1, 2, 3... (when you ask a child to start counting)

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2

Whole number

Natural numbers + 0

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3

Integers

Whole numbers including those that are negative -3, -2, -1, 0, 1, 2, 3

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4

Rational numbers

fractions, decimals (terminating or repeating), including integers, whole numbers, etc.

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5

Irrational numbers

any decimal that goes on forever pi, square root of 2

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6

set

any collection of objects, people, or things that are carefully defined

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7

member or element

what a term inside a set is called

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8

E

used to say "is an element of" 7 E {prime numbers}

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9

O w/ line through it

empty set, can also be written as { }

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10

subset

A = {0, 1, 2, 3} subsets: {0} {1} {2} {3} {o} {0, 1, 2, 3}

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11

intersection

a ________ of two sets consists of the elements they have in common symbol is like: n A n B = C or {2,4,6,8,10} n {3,4,5,6,7,8} = {4,6,8}

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12

union

when ALL the elements of both sets are listed without repeating any elements twice sign is u

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