1. Number and Numerical Operations

2. Real Numbers Rational Numbers -Can be written as a fraction. -In decimal form, either terminates or repeats Examples: Integers -The whole numbers and their opposites {…, -3, -2, -1, 0, 1, 2, 3,…} Whole Numbers -Zero and the natural numbers {0, 1, 2, 3, …} Natural Numbers -Also known as the counting numbers {1, 2, 3, …} Irrational Numbers -Cannot be written as a fraction -In decimal form, non-terminating and non-repeating Examples:

3. Other Classifications of Numbers Prime – Only factors are 1 and itself. For example, 2, 3, 17, 31, etc. Composite – Has other factors then 1 and itself. For example, 6, 14, 25, etc. Even – Divisible by 2. For example, 2, 4, 6, 8,… Odd – Not divisible by 2. For example, 1, 3, 5, 7,…

4. Order of Operations PEMDAS 1.Parenthesis 2.Exponents 3.Multiplication and Division (from left to right) 4.Addition and Subtraction (from left to right) And to help remember… “Please Excuse My Dear Aunt Sally”

5. Zero and Negative Exponents Any number raised to the zero power equals 1. For example, 5 0 = 1 Numbers raised to negative exponents get “flipped”. For example,

6. Fractional Exponents Fractional exponents represent the power to raise the number to, over the root to take. For example,

7. Ratios A comparison between 2 different things. Can be written 3 different ways: 1.The ratio A to B 2. 3.A:B