Learning Objectives:

__Order of Operations and Expressions__

The **Basic Rules** for the **order of operations** are:

**1)** Calculate within the innermost** Parentheses** or grouping symbols, **( ), [ ], { },** and above or below fraction bars.

**2)** Simplify all expressions with **Exponents. **

**3) Multiply** and **Divide** from left to right.

**4) Add** and **Subtract** from left to right.

The **Distributive Property** states when we multiply a factor and a sum or difference, we multiply each term of the sum or difference by the factor**. **

**1) a(b+c) = ab+ac , 2) a(b-c) = ab-ac **

A **Variable** is a letter that represents an unknown quantity.

A **Variable Expression** consists of **variables, constants, numbers **and** operations like addition, subtraction, multiplication, **and** division. **

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**Hook Questions:**

*1. Why is it important that we have an agreed upon order of operations?*

*2. The saying "Please Excuse My Dear Aunt Sally" has been used to recall the standard order of operations. How do you think it helps?*

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