Algebraic Expressions Chapter 1, Lesson 1C Pages 33-37

Algebraic Expressions (1-1C) Learning Objective #3: I can evaluate simple algebraic expressions. Standard: 7.EE.4 Vocabulary: Variable Algebra Algebraic expression Coefficient Define a variable

Algebraic Expressions The number of squares on the figure is two more that the figure number. You can use a variable to represent the number of squares. A variable is a symbol that represents an unknown quantity.

Algebraic Expressions The branch of mathematics that involves expressions with variables is called algebra. Algebraic expressions contain variables, numbers, and at least one operation. Evaluate???

Algebraic Expressions To evaluate expressions: Plug-in the value of each variable Solve following the order of operations PEMDAS Remember to work down!

Examples

Algebraic Expressions In algebra, the multiplication sign is often omitted. The number before the variable is called the coefficient.

Examples

Define a Variable Sometimes you will need to translate a verbal phrase into an algebraic expression. The first step is to define a variable- choosing a variable to represent an unknown quantity.

Example

Homework…