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

3. 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

4. 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.

5. 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???

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

7. Examples

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

9. Examples

10. 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.

11. Example

12. Homework…