# Search for media from: "Mammoth2020"

#### Multiplication and division equations ( pre-algebra / 7th grade math)

This is a beginner lesson for pre-algebra or 7th grade math — one-step equations that are solved by multiplying or dividing. First, I explain how we simplify expressions such as 5x/5 (the …

From  Mammoth2020 on July 9th, 2020 0 likes 27 plays

#### Addition and Subtraction Equations (pre-algebra)

I teach how to solve simple linear equations where the unknown x only appears once, and can be solved by either adding the same number to both sides of the equation, or subtracting the same number…

From  Mammoth2020 on July 9th, 2020 0 likes 0 plays

#### Solving equations — beginner lesson — examples with a pan balance (pre-algebra)

This is a beginner video lesson (pre-algebra or 7th grade) explaining: WHAT are equations? What is the general idea as to how we solve equations? An equation is of the form (expression) =…

From  Mammoth2020 on June 29th, 2020 0 likes 33 plays

#### The Distributive Property (pre-algebra)

In this basic lesson I show several examples of using the distributive property of multiplication over addition, including an area model (rectangles). Lastly we even touch on using the distributive…

From  Mammoth2020 on June 26th, 2020 0 likes 23 plays

#### Order of Operations, Part 2 (pre-algebra)

In this second part we will solve more challenging examples that have more operations than the ones in part 1. The expressions include exponents plus other operations. In these examples, divisions…

From  Mammoth2020 on June 25th, 2020 0 likes 1 plays

#### Order of Operations (pre-algebra lesson)

This is the first part of the lesson on the order of operations. I start out with a mini-review of exponents and then we study the order of operations (PEMDAS rule), followed by a few solved…

From  Mammoth2020 on June 25th, 2020 0 likes 1 plays

#### Writing Expressions and Equations (pre-algebra)

This is a pre-algebra math lesson where I show how to write an equation to match a written sentence (2 example problems). Then we look at mathematical expressions that match a real-life situation…

From  Mammoth2020 on June 25th, 2020 0 likes 5 plays

#### What are Expressions and Equations? (pre-algebra)

This video lesson explains the difference between an expression and equation, gives examples of both, and shows how to write expressions from verbal descriptions. In a nutshell, an expression…

From  Mammoth2020 on June 24th, 2020 0 likes 27 plays