7 terms

Real Number System

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Whole Numbers
Natural Numbers and 0. Examples: 0,1,2,3,4,5,6...... (Does not include fractions or decimals)
Integers
Positive and Negative Whole Numbers and 0. Examples: .... -3, -2, -1, 0, 1, 2, 3.....(Does not include fractions or decimals)
Natural Numbers
Counting Numbers. Examples: 1,2,3,4,5,6...... (does not include 0, fractions and decimals)
Rational Number
All numbers that can be expressed as a fraction. Includes ALL natural, whole and integer numbers. Examples: 5, 1/5, -7, .08, -4.3
Irrational Number
Any non-repeating, non-ending number. Irrational numbers are not rational. Examples: .4523975......., square root of 3, pi
Real Number
Any number that exists. Includes all rational and irrational numbers.
Subset
A set under a set. Example: Natural numbers are a subset of rational numbers. Natural, whole and integer numbers are all subsets to rational numbers.
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