Chapter 1 Lesson 1 Expressions and Formulas

Vocabulary Variable- Symbols, usually letters, used to represent unknown quantities. Algebraic Expressions- Expressions that contain at least one variable. Order of Operations- Four step system to solve an algebraic expression. Monomial- An algebraic expression that is a number, a variable, or the product of a number and one or more variables. Constants- Monomials that contain no variables. Coefficient- The numerical factor of a monomial. Degree- The sum of the exponents of the variables of a monomial. Power- An expression of the form X n, power used to refer to the exponent itself.

Vocabulary Continued Polynomial- A monomial or a sum of monomials. Terms- The monomials that make up a polynomial. Like Terms- Monomials in a polynomial that have the same variables to the same exponents. Trinomial- Polynomial with three unlike terms. Binomial- Polynomial with two unlike terms. Formula- A mathematical sentence that expresses the relationship between certain quantities.

Order of Operations Step 1- Evaluate expressions inside grouping symbols Step 2- Evaluate all powers Step 3- Multiply/Divide from left to right Step 4- Add/Subtract from left to right

PEMDAS Parentheses Exponents Multiply Divide Add Subtract

PEMDAS Please Excuse My Dear Aunt Sally

Monomials

Evaluate Algebraic Expressions

Using a Formula

Homework 1-1 Worksheet