Introduction to Algebra

Introduction to Algebra

Variables, Expressions & Equations

What are they?

• Variables are letters used to represent numbers

• Expressions are variables WITH a math operation (+ - x ÷)

• Equations are two expressions separated by an equal sign (=)

Multiple Choice

What is this?

n

• variable

• expression

• equation

Multiple Choice

What is this?

n+3

• variable

• expression

• equation

Multiple Choice

What is this?

n+3 = 7

• variable

• expression

• equation

Multiple Choice

What is this?

n-7

• variable

• expression

• equation

Multiple Choice

What is this?

n-7=15

• variable

• expression

• equation

Multiple Choice

What is this?

a

• variable

• expression

• equation

Multiple Choice

What is this?

3a

• variable

• expression

• equation

Multiple Choice

What is this?

3a = 15

• variable

• expression

• equation

Multiple Choice

What is this?

g-4

• variable

• expression

• equation

Multiple Choice

What is this?

g

• variable

• expression

• equation

Multiple Choice

What is this?

g-4 = 21

• variable

• expression

• equation

Poll

Do you understand the difference between variables, equations and expressions?

• Yes

• No