THE NUMBER SYSTEM
저자: Babatuan, Loela I.

1. Imaginary Numbers
1.1. Square Root of (-1) = i
2. Real Numbers
2.1. Irrational Numbers
2.1.1. Numbers which cannot be written as a decimal that ends or repeats
2.1.1.1. π, square root of 2, 22/7
2.2. Rational Numbers
2.2.1. Numbers that can be written as a repeating or finite decimal
2.2.1.1. .75, 2, -3
2.3. Integers
2.3.1. Numbers that can be written as fractions
2.3.1.1. 2/3, 1/2, 0, -7/6, 4/2
2.4. Natural Numbers=Whole Number
2.4.1. Counting Numbers
2.4.1.1. -2, -1, 0, 1, 2, 3....