Art of Problem Solving
Subtraction and the Distributive Property
There's got to be a better way. Scholars learn that the distributive property does work with subtraction and not just addition. Using that fact, the video shows how to find the product of two numbers by rewriting a complicated number as...
Art of Problem Solving
Subtraction Problems
Subtraction does not work with the commutative property ... or does it? Confronted with a difficult problem, the narrator realizes that by writing the subtractions as adding a negative, he can rearrange the problem. Pupils learn that as...
Art of Problem Solving
Subtraction with Negatives Part 2
Dive deeper into subtraction. The presenter shows two more ways to use the definition of subtraction to solve subtraction problems. Using the distributive and commutative properties, pupils learn how to solve problems such as subtracting...
Art of Problem Solving
Subtraction with Negatives Part 1
What is the definition of subtraction when dealing with negatives? The short video provides the definition of subtraction. Scholars observe as the presenter applies the definition to examples with negative numbers.
Math Meeting
Adding and Subtracting - Negative Numbers
Here is a video that adds visual context and a steady stream of step-by-step instructions for adding and subtracting negative integers, with the help of a number line.
Virtual Nerd
What is the Opposite, or Additive Inverse, of a Number?
Teach your class about the additive inverse! Using examples first and a definition second, this video explains what the additive inverse it and how to find the additive inverse of any given number or variable. A quick concept review for...
Virtual Nerd
How Do You Subtract a Negative Number from a Positive Number?
Subtracting an integer is as simple as adding the opposite value. Watch this video to see an example of how to change the signs and then add the two integers. Use this as a review after you have taught this valuable skill to your middle...
Virtual Nerd
What is Absolute Value?
As long as you keep in mind that there is no such thing as negative distance, then you will know the meaning of absolute value. The teacher writes on a white board to explore integers on a number line, give a definition of absolute...
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Adding, Subtracting Negative Numbers
This video teaches addition and subtraction of negative numbers using a number line. Practice problems are available. [9:16]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Order of Operations
This video demonstrates the order of operations in a numerical expression. Practice problems are available. [9:40]
Khan Academy
Khan Academy: Inverse Property of Addition
The simple idea that a number plus its negative is 0. [2:59]
Loyola University Chicago
Math Flix: Order of Operations in Word Problems 2
This QuickTime movie provides an opportunity to use the order of operations in a word problem and find the solution. As you watch and listen to the teacher and students interact it helps clarify the thinking behind applying this concept.
Math TV
Math tv.com: Basic Mathematics: Decimals: Multiplication
Videos feature math students providing step-by-step solutions to problems involving decimal multiplication. In the left hand menu, click on Basic Mathematics, Decimals, Multiplication.
Math Mammoth
Math Mammoth: Basics of Integers: Beginner Lesson for Pre Algebra
This video discusses basic ideas and concepts related to integers, e.g., positive and negative integers, real-world applications, and absolute value. [11:07]
Math Mammoth
Math Mammoth: Add and Subtract Integers Practice: Thinking of Number Line Jumps
Demonstrates how to add and subtract integers using a number line. [5:32]
Math Mammoth
Math Mammoth: How to Turn Subtraction of Integers Into Addition: Why It Works
This video explains how to subtract negative integers and how this would work on a number line. Problems with the addition and subtraction of several integers are then presented. [10:26]
Math Mammoth
Math Mammoth: The Rules for Multiplying Integers and Why They Work
A lesson in how to solve multiplication questions involving negative integers, including some where the negative integer has an exponent. [9:53]
Planet Nutshell
Planet Nutshell: Math Shorts: Additive Inverse
Planet Nutshell Math Shorts provide animated videos that explain various math topics. On this site students learn about additive inverses.
Khan Academy
Khan Academy: Adding & Subtracting Negative Numbers
Demonstrates with the help of a number line how to add and subtract 1-digit negative numbers. [4:06]
Virtual Nerd
Virtual Nerd: How Do You Find the Additive Inverse of a Polynomial?
Two polynomials are additive inverses if they are opposites of each other. This tutorial shows how to find the additive inverse of a given polynomial. [3:43]
Math Playground
Math Playground: What Is Pemdas?
This video explains the acronym PEMDAS and how it relates to the order of operations when solving an equation.
Khan Academy
Khan Academy: Arithmetic Properties: Inverse Property of Addition
This video demonstrates the simple idea that a number plus its negative is 0.
Khan Academy
Khan Academy: Dividing Positive and Negative Numbers
A video showing the basics of dividing integers.
Sophia Learning
Sophia: Powers and Order of Operations
This video tutorial demonstrates the correct order of operations by solving an example problem step-by-step.