Arithmetic and Pre-Algebra Teacher Resources
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Most elementary and middle schools just call this "Math". Here we cover everything from counting, number operations, and fractions to evaluating basic expressions and equations. All of this adds up to preparation for the eventual study of Algebra.
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Lesson Planet Curated
Balanced Assessment: Advanced High School Math Packet
Nineteen resources make up the Balanced Assessment: Advanced High School Math Packet designed to test learners' knowledge in Algebra II, Geometry, and Pre-Calculus classes. To demonstrate their understanding of concepts related to these...
Khan Academy
Adding Mixed Numbers, Fractions, Pre-Algebra
This video will demonstrate adding mixed numbers. Sal explains that adding mixed numbers can be done by looking at the whole number separately from the fraction. Because his explanation is brief, this video would be great as a supplement...
Khan Academy
Adding/Subtracting Negative Numbers, Pre-Algebra
Guiding viewers through the addition and subtraction of numbers, this video includes many tips to help new learners internalize the concept of a number line. It clarifies the relationship between positive and negative numbers, including...
Curated OER
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...
Curated OER
Addition Techniques
Charley and Professor Perez show us how to add numbers in a variety of ways. They use a number line to show how the various methods work. This clip shows learners that there are multiple ways to solve any addition problem. Intended for...
Khan Academy
Adding numbers with Different Signs (Example), Pre-Algebra
Explaining the concept of adding integers with different signs can become confusing. Use this video to provide students with a clear and explicit demonstration of how negative and positive numbers are added together. Sal uses a number...
Curated OER
How Do You Find the Additive Inverse of a Polynomial?
Finding the additive inverse is not as complicated as you might think. The instructor demonstrates how to multiply each of the terms in the polynomial by -1 and explains how this works. But wait, there's a quicker way. What's that you...
Northeast Arkansas Education Cooperative
Simplify Algebraic Fractions by Factoring
A brief presentation with laser-like focus, this video talks young mathematicians through the mechanics of simplifying algebraic fractions by factoring trinomials. While the factoring itself is assumed to be a mastered skill, the...
Curated OER
How Do You Solve an Equation With Fractions With The Same Denominators Using Addition?
You have an equation with an unknown variable and fractions. How do you solve this kind of equation? You can do it using the addition property of equality to first isolate the variable. Then, combine the fractions and since they have a...
Northeast Arkansas Education Cooperative
Simplify Algebraic Fractions by Factoring 2
Take your class through the mechanics of simplifying algebraic fractions by factoring trinomials. Though the steps for factoring are assumed known, the process of identifying and canceling common factors are detailed with...
Curated OER
How Do You Solve an Equation Using Addition?
The teacher demonstrates how to use the addition property of equality, applying it to both sides of the equation to find the solution.
Khan Academy
Exponent Example 1, Exponents, Radicals, and Scientific Notation, Pre-Algebra
Explain an exponential number. Sal shows that five to the third power is 5x5x5 while 5x3 is 5+5+5. He demonstrates that they have very different answers. Note: This is part two in a set of videos on exponents. It may serve students best...
Khan Academy
Order of Operations Example, Arithmetic Properties, Pre-Algebra
This resource shows how to evaluate complex statements using the order of operations. Mr. Khan explains that parentheses take precedence, followed by exponents, then multiplication and division, and finally addition and subtraction,...
Khan Academy
Identity Property of 1, Arithmetic Properties, Pre-Algebra
Part of building solid number sense is understanding the laws and properties of multiplication and addition. Elementary school students can watch Sal multiply using the number one. He explains that multiplying any number by one equals...
Curated OER
How Do You Rewrite Subtraction as Addition?
A quick look at how to write a subtraction as an addition problem. The first value stays the same and the second value becomes the opposite value which is added to the first.
Curated OER
What's the Addition Property of Equality?
A basic definition of the addition property of equality. Use this video to recap a lesson on the addition property of equality, or have learners use it as a reference tool when they are working at home.
Curated OER
How Do You Solve an Equation Using Addition?
The teacher demonstrates how to use the addition property of equality, applying it to both sides of the equation to find the solution.
Curated OER
How Do You Find the Additive Inverse of a Polynomial?
Finding the additive inverse is not as complicated as you might think. The instructor demonstrates how to multiply each of the terms in the polynomial by -1 and explains how this works. But wait, there's a quicker way. What's that you...
Curated OER
What's the Addition Property of Inequality?
The addition property of inequality is just like the addition property of equality. They each state that whatever is added to one side of the equation or inequality must be added to the other side. Watch this video and see how the...
Curated OER
How Do You Solve a Decimal Inequality Using Addition?
In order to solve this inequality use the addition property of inequality to isolate the variable. Don't forget that these are decimal numbers. So be sure to line up the decimals according to the rules of adding decimals.
Curated OER
How Do You Solve an Inequality Using Addition?
Use the addition property of inequality to solve this problem. It's just a one step solution and then the instructor shows how to write the answer in set builder notation.
Curated OER
Pre-Algebra Basic Operations: Decimals
In this pre-algebra decimal worksheet, students complete a total of 28 problems performing multiplication, division, subtraction and addition of decimals and fractions.
Curated OER
How Do You Use Addition to Solve an Inequality Word Problem?
Word problems. Inequalities. Money. What? Does Marissa have enough money left in her bank account to go to the movies? One variable, two given amounts. Set up this inequality to determine how much Marissa needs to have in her bank...
Curated OER
What are Inverse Operations?
Explore inverse operations. Video viewers watch as a teacher shows how to "undo" an operation by using the opposite operation. By the end, learners should grasp that addition is the opposite of subtraction and division is the opposite of...
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