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 213 resources
Khan Academy
Khan Academy: One Step Addition & Subtraction Equations
See Sal Khan illustrate the explanation of balancing simple algebraic equations. [2:08]
Virtual Nerd
Virtual Nerd: What's the Addition Property of Inequality?
The addition property of inequality says that if you add a number from one side of an inequality you have to add that same number from the other side of the inequality as well. Watch the tutorial to see how this works. [1:15]
Brightstorm
Brightstorm: Additive and Multiplicative Inverses Concept
Inverses, like the additive inverse or multiplicative inverses, are important for understanding how to cancel terms when solving for variables in equations and formulas. When a number is added to its additive inverse, the result is zero....
Shmoop University
Shmoop: Basic Operations: Adding Integers
Students learn how to add integers. The resource consists of notes, examples, and practice problems with solutions.
Khan Academy
Khan Academy: One Step Addition & Subtraction Equations: Fractions & Decimals
Practice solving equations in one step by adding or subtracting a number from both sides. These problems involve decimals and fractions. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a...
Khan Academy
Khan Academy: One Step Addition & Subtraction Equations
Practice solving equations in one step by adding or subtracting the same value from both sides. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Virtual Nerd
Virtual Nerd: Rules for Using Absolute Value to Add Integers
Student learn how to add integers while using absolute value while watching a teacher created video. Students learn to add two integers that have the same sign and to add two integers with different signs.
Khan Academy
Khan Academy: Adding Decimals: Thousandths
In this exercise, students practice adding decimals in the thousandths place. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Khan Academy
Khan Academy: Adding Decimals 0.5
In this exercise, students practice adding decimals 0.5. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Khan Academy
Khan Academy: Volume Word Problems
Find the volume of rectangular prisms to solve word problems. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Virtual Nerd
Virtual Nerd: How Do You Add Mixed Fractions With the Same Denominator?
Demonstrates how to add two mixed numbers, where the fractions have the same denominator, by adding the whole numbers and then the fractions. [5:23]
Virtual Nerd
Virtual Nerd: How Do You Add Polynomials?
Watch this video tutorial to see step-by-step instructions on how to add polynomials of any size by grouping like terms and then combining them together. [5:00]
Virtual Nerd
Virtual Nerd: How Do You Add Fractions With Different Denominators?
Watch this video tutorial to see how to add fractions with different denominators together. First, you're going to need a common denominator. [1:57]
Virtual Nerd
Virtual Nerd: How Do You Add Fractions With the Same Denominator?
In this video tutorial, learn how easy it is to add up fractions once they have the same denominator. [0:50]
Virtual Nerd
Virtual Nerd: How Do You Add Decimals?
Video tutorial explores how to add decimals by hand with paper and pencil. [3:18]
Virtual Nerd
Virtual Nerd: How Do You Add a Negative Number to a Positive Number?
This tutorial explains how to combine a positive and a negative number with a number line. [4:52]
Virtual Nerd
Virtual Nerd: How Do You Subtract Polynomials Vertically?
This tutorial shows the steps you need to take when subtracting two polynomials vertically. [5:30]
Virtual Nerd
Virtual Nerd: How Do You Subtract Mixed Fractions With the Same Denominator?
Demonstrates how to subtract two mixed numbers, where the fractions have the same denominator, by subtracting the whole numbers and then the fractions. [5:20]
Virtual Nerd
Virtual Nerd: How Do You Subtract Fractions With Different Denominators?
Watch how to subtract fractions with different denominators by finding a common denominator. [3:27]
Virtual Nerd
Virtual Nerd: How Do You Subtract Fractions With the Same Denominator?
To subtract fractions with like denominators just subtract the numerators and put the result over the common denominator. Watch this video tutorial to see the process in action. [1:54]
Virtual Nerd
Virtual Nerd: What's the Subtraction Property of Inequality?
The subtraction property of inequality states that if you minus a number from one side of an inequality you have to minus that same number from the other side of the inequality as well. Watch the tutorial to see how this works. [1:16]
