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Khan Academy

Khan Academy: Adding and Subtracting Polynomials With Two Variables Review

For Students 10th Standards
Adding and subtracting polynomials is all about combining like terms. When the terms have two variables, it gets a little bit tricky to figure out which terms are like terms. In this article, we review some examples and give you a chance...
Activity
Sophia Learning

Sophia: Adding and Subtracting Rational Expressions

For Students 9th - 10th Standards
This learning tutorial investigates how to add and subtract rational expressions with like and unlike denominators. The lesson includes two videos that demonstrate the process of adding and subtracting rational expressions and four...
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Math Warehouse

Math Warehouse: Add and Subtract Integers Worksheet [Pdf]

For Teachers 3rd - 8th Standards
Worksheet contains problems through which students can practice adding and subtracting integers. Real-world application of the skill is provided as well as a quick, diagnostic pre-test.
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Math Drills

Math Drills: Integers Worksheets

For Students 1st - 9th
Download these free worksheets to sharpen your skills working with integers. Sheets focus on comparing and ordering integers, adding, subtracting, multiplying and dividing integers, and order of operations with integers.
Website
Shodor Education Foundation

Shodor Interactivate: Fraction Adding and Subtracting

For Students 3rd - 8th Standards
Use this discussion, provided by Shodor, to reinforce your knowledge on adding and subtracting fractions with unlike denominators.
Unit Plan
Scholastic

Scholastic: Study Jams! Math: Algebra: Adding and Subtracting Equations

For Students 5th
Sing a song, practice step by step, and then assess your knowledge of adding and subtracting equations.
Unit Plan
Scholastic

Scholastic: Study Jams! Math: Adding and Subtracting Decimals

For Students 5th - 6th Standards
Explore how to add and subtract decimals with this interactive lesson. Then test your knowledge with a quick quiz.
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McGraw Hill

Glencoe Mathematics: Online Study Tools: Subtracting Polynomials

For Students 9th - 10th Standards
This site gives a short interactive quiz which allows students to self-assess their understanding of the concept of subtracting polynomials.
Unit Plan
Mangahigh

Mangahigh: Number: Add and Subtract Fractions

For Students 5th - 8th Standards
This site provides students practice with the concept of adding and subtracting fractions. Students can learn about the topic by completing an interactive tutorial. Students can then take a ten question timed test to practice the skill.
Unit Plan
Mangahigh

Mangahigh: Number: Add and Subtract Decimals

For Students 4th - 8th Standards
This site provides students practice with the concept of adding and subtracting decimals. Students can learn about the topic by completing an interactive tutorial. Students can then take a ten question timed test to practice the skill.
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Shmoop University

Shmoop: Fractions & Decimals: Adding and Subtractions Fractions

For Students 9th - 10th Standards
The mathematics resource explores adding and subtraction fractions. Students examine the topics through class notes and examples. Practice problems with solutions are available to check for comprehension of the concepts.
Unit Plan
Oswego City School District

Regents Exam Prep Center: Operations With Radicals

For Students 9th - 10th Standards
The rules for how to simplify radicals and how to perform the operations of adding, subtracting, multiplying, and dividing radicals are explained. A multiple-choice interactive quiz is provided for the students to test their knowledge of...
Interactive
Fun Brain

Fun Brain: Fraction Soccer

For Students 3rd - 8th
Compete in a soccer shootout by adding, subtracting, multiplying, and dividing fractions. Score goals for your team and block your opponent's shots by answering correctly.
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Adding and Subtracting Fractions With Different Denominators

For Students 4th - 5th Standards
[Free Registration/Login may be required to access all resource tools.] This video gives steps of finding common denominators and then adding and subtracting multiple fractions together. After the video, there are practice problems...
Interactive
Fun Brain

Fun Brain: Soccer Shootout (Fractions and Whole Numbers)

For Students 3rd - 5th
Using fractions and whole numbers, score goals and block your opponent's goals by correctly answering addition, subtraction, multiplication, and division problems. Four levels of play--easy, medium, hard, and super brain--to test your...
Interactive
AAA Math

Aaa Math: Adding Two Digit Numbers

For Students K - 1st Standards
This lesson has an explanation for adding two-digit numbers using paper and pencil. There is also a game to practice your skills. The game gives you a percent score of your correct answers, as well as running totals of your correct and...
Unit Plan
Lesson Tutor

Lesson Tutor: Addition and Subtraction of Decimals

For Students 4th - 6th Standards
This site is an online lesson plan and practice problems for students learning how to add and subtract two decimal values are provided here. Detailed explanation of both the methods and the practice questions are provided for easy...
Activity
NumberNut

Number Nut: Decimals

For Students 5th - 7th Standards
Do you know what a decimal is and how it is related to fractions? Find out and practice your skills playing the related interactive games.
Lesson Plan
Other

Sumdog Teacher Portal: One More, One Less

For Teachers Pre-K - 1st
This engaging lesson plan introduces students to basic addition and subtraction by adding or subtracting one. Teachers can create a free Sumdog account and usernames for their students to practice the skills through online learning games.
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McGraw Hill

Glencoe Mathematics: Online Study Tools: Solving Inequalities

For Students 9th - 10th Standards
This site gives a short interactive quiz which allows students to self-assess their understanding of the concept of solving inequalities by adding and subtracting.
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Math Drills

Math Drills: Decimals Worksheets

For Students 9th - 10th
Download these worksheets to sharpen your skills working with decimals. Sheets focus on rounding decimals, expanded form, comparing decimals, converting decimals, adding, subtracting, multiplying, and dividing decimals, and order of...
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Shmoop University

Shmoop: Fractions & Decimals: Adding and Subtracting Mixed Numbers

For Students 9th - 10th Standards
The mathematics resource explores addition and subtraction with mixed numbers. Students examine the topics through class notes and examples. Practice problems with solutions are available to check for comprehension of the concepts.
Whiteboard
SMART Technologies

Smart: Foundational Math Concepts for Elementary Ages

For Teachers K - 1st Standards
Practice everyday math skills such as adding, subtracting, multiplying, dividing, place value, counting money, telling time, fractions, decimals, and more.
Lesson Plan
PBS

Pbs Kids Afterschool Adventure!: Operation: Rainbow Math Activity Plan

For Teachers Pre-K - K
Red apples, orange candles, yellow stars, green frogs, and blue, indigo, and violet flowers-they all add up to Rainbow Math fun! During this adventure children learn the colors of the rainbow as they practice counting, adding and...