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Real Number System

Review of Terms

Natural Numbers Counting numbers beginning with 1 and going to infinity. No zero, decimals, fractions or integers.
Whole Numbers Counting numbers and the inclusion of zero. No decimals, fractions or integers.
Rational Numbers All numbers which can be written as a ratio (or fraction). This includes fractions, repeating decimals, integers, zero and counting numbers.
Irrational Numbers Numbers that cannot be written as a ratio (or fraction). This includes non-repeating and non-terminating decimals, non-perfect square roots and pi.
Real Numbers The set of numbers that include natural, whole, rational and irrational numbers as well as integers.
Integers Counting numbers and their opposites as well as zero. No decimals or fractions. The square root of some perfect squares may fall into this category.
Created by: theboss1000