# 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.

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#### 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...

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#### 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...

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#### Review of Pre-Algebra

Middle and high schoolers review topics covered Pre-Algebra. They solve problems questions dealing with exponents, square roots and absolute value. They use the rules of divisibility and identify prime numbers. This two-page on-line...

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#### 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...

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#### 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...

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#### 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.

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#### 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...

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#### 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...

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#### Pre-Algebra Equations

In this solving pre-algebra addition equations learning exercise, students use the sum and one addend to find the missing number. Students solve 10 problems.

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#### 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.

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#### 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.

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

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

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#### Prealgebra

Pre-algebra—all wrapped up in one place. The eBook contains everything needed to teach a typical Pre-Algebra course. Concepts in the course build upon previously learned concepts, allowing mathematicians to see the connections between...

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#### 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...

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#### 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.

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#### 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.

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#### Pre-Algebra Basic Operations: Decimals

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

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#### Arithmetic Commutative Property of Addition 4 Worksheet

Build strong algebraic reasoning skills as well as an understanding of the commutative property of addition. Learners work to solve 16 single digit addition problems using the fabulous commutative property.

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#### Arithmetic Commutative Property of Addition 2 Worksheet

Here is a practice sheet perfect for building foundational math skills while providing structured practice. Learners solve 16 single digit math problems using the commutative property of addition.

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#### Basic Math Addition of Decimals

In this addition of decimals worksheet, students complete a set of 16 simple problems. Page has multiple links to additional resources.

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#### Arithmetic Addition of Decimals 1

In this addition of decimals learning exercise, students complete a set of 16 simple problems using decimals to the hundredths place. Page has multiple links to additional resources.

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#### 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...

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#### Writing Task 6.EE.4 Item 2

Young mathematicians demonstrate their knowledge of algebraic expressions with this short writing exercise. Using their understanding of multiplication as repeated addition, learners must explain in writing whether or not two given...