# Arithmetic and Pre-Algebra Teacher Resources

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.

Showing

**167**resources
Lesson Planet: Curated OER

#### 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...

Lesson Planet: 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...

Lesson Planet: 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...

Lesson Planet: Curated OER

#### 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 steps...

Lesson Planet: Curated OER

#### 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 care and...

Lesson Planet: 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...

Lesson Planet: 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...

Lesson Planet: 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.

Lesson Planet: 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.

Lesson Planet: 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.

Lesson Planet: Curated OER

#### How Do You Find the Additive Inverse of a Polynomial?

Lesson Planet: Curated OER

#### How Do You Solve an Equation Using Addition?

Lesson Planet: 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...

Lesson Planet: 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.

Lesson Planet: 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.

Lesson Planet: Curated OER

#### Pre-Algebra Basic Operations: Decimals

In this pre-algebra decimal activity, students complete a total of 28 problems performing multiplication, division, subtraction and addition of decimals and fractions.

Lesson Planet: 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...

Lesson Planet: 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...

Lesson Planet: Curated OER

#### How Do You Solve a Two-Step Equation with Fractions Using Reverse Order of Operations and Reciprocals?

In order to solve any equation, one must isolate the variable. The teacher demonstrates how to solve this multi-step equation first by using the addition property of equality and then multiplying by the reciprocal of the fraction...

Lesson Planet: Curated OER

#### Adding & Subtracting Fractions and Mixed Numbers

In this pre-algebra addition and subtraction of fractions and mixed numbers worksheet, students add or subtract fractions in the first 10 problems. They write the answers in simplest terms. They add or subtract mixed numbers in the last...

Lesson Planet: Curated OER

#### Who Wants to Win Millions?

Similar to the popular game Jeopardy, pre-algebra students will play to win. This game focuses on solving and writing simple equations using subtraction, multiplication, or addition. A great way to review for the big test!

Lesson Planet: Curated OER

#### Pre Algebra Variables

Here is a variable equations learning exercise which invites learners to solve equations with variables in them involving addition, subtraction, multiplication, and division. Pupils complete nine problems.

Lesson Planet: Curated OER

#### The Sum of Our Integer Intelligences

Young mathematicians explore integers. They review adding integers through engaging in mathematical labs. Each lab station is designed to reflect one of the multiple intelligences. Resources for all activities are provided.

Lesson Planet: Curated OER

#### What is the Associative Property?

A straightforward definition of the associative property of addition and multiplication, this resource could be used to help learners tackle the concept. You might consider giving the link to struggling class members so they can use it...