Types of Numbers
1. Natural Numbers — also called positive integers, counting numbers, or natural numbers. They are the numbers {1, 2, 3, 4, 5, …} 2. Whole Numbers — This is the set of natural numbers, plus zero, i.e., {0, 1, 2, 3, 4, 5, …}. 3. Integers — This is the set of all whole numbers plus all the negatives (or opposites) of the natural numbers, i.e., {…, ⁻2, ⁻1, 0, 1, 2, …} 4. Rational Numbers — These is all the fractions where the top and bottom numbers are integers; e.g., 1/2, 3/4, 7/2, ⁻4/3, 4/1 [Note: The denominator cannot be 0, but the numerator can be]. 5. Real Numbers — This includes all numbers that can be written as a decimal. This includes fractions written in the decimal form e.g., 0.5, 0.75 2.35, ⁻0.073, 0.3333, or 2.142857. It also includes all the irrational numbers such as π, √2, etc. Every real number corresponds to a point on the number line. 6. Irrational Numbers — All the real numbers that are not rational numbers. An irrational number is a type of real number whi...
