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Math 7 :: Unit 1 Lesson 1: Expressions and Order of Operations

Math 7 :: Unit 1 Lesson 1: Expressions and Order of Operations

Author: Lloyd Murphy

Students will be able to (SWBAT) :

-write and evaluate powers, and

-use the order of operations to simplify numerical and algebraic expressions

In the world of numbers there are many ways to solve a problem. And, several of those ways are correct, but many of them are incorrect if you don't follow the rules of Math. This lesson will review with you some of the rules that are necessary to achieve success in your Math coursework. These are rules many people may be following and not telling you.

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Concept 1: Writing Powers

A power is a way of writing repeated multiplication. The exponent tells how many times the base is being multiplied.

Source: Math: Course 2 (McDougal Littell (2008))

Concept 2: Finding the Value of a Power

Student will be able to evaluate expressions including powers.

Understanding exponents

In this video we learn to evaluate powers, the difference between even and odd exponents and how to write powers.

Source: The Khan Academy

OPTIONAL: Concept 1 and 2 Practice Problems

Complete the following practice problems if you would like to make sure you understand Concepts 1 and 2.



Concept 3: Using the Order of Operations

Students Will Be Able To (SWBAT) simplify numerical expressions using the order of operations.

Introduction to the Order of Operations

In this video you learn how to simplify numerical expressions using the order of operations.

Source: The Khan Academy

Concept 4: Evaluating Algebraic Expressions

Students will be able to evaluate an algebraic expression given values of the variables included in the expression. Students should be able to describe the steps taken to evaluate the algebraic expression.

Concept 5: Evaluating Real-Life Expressions

Students will be able to evaluate a given algebraic expression which has application in a real-life scenario and must calculate the requested outcome based upon the given formula (algebraic expression).