The Number System

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

2.1.2. 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

2.2.2. .75, 2, -3

2.2.3. Integers

2.2.3.1. Numbers that can be written as fractions

2.2.3.2. 2/3, 1/2, 0, -7/6, 4/2

2.2.3.3. Natural Numbers = Whole Numbers

2.2.3.3.1. Counting Numbers

2.2.3.3.2. -2, -1, 0, 1, 2, 3....