Read through this explanation of how to add three digit numbers. Use the online game to practice this skill. The game will keep running totals of your correct and incorrect answers. It will also show you a percent score of the correct answers.
This pathway will show you how to use your dashboard to add or create your own content, and how to remix it into customized learning pathways.
Practice adding and subtracting fractions in these problems that include inequalities.
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Demonstrates how to add and subtract pieces of fruit using the numbers 5 and 3. [2:17]
Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.
Practice adding and subtracting fractions with different denominators.
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Practice solving word problems by adding and subtracting fractions. The fractions used in these problems have like (common) denominators. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.
Sal adds 53+17 by breaking apart the numbers and making a group of 10. [3:35]
Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.
Sal uses an understanding of place value to add decimals, such as 0.68+0.33. [6:56]
Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.
Sal simplifies a polynomial addition expression. [2:00]
Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.
Students use estimates and work on strategies for adding and subtracting decimals.
This lesson covers adding and subtracting matrices with the same dimensions. Students can watch a video tutorial, explore guided notes and then attempt practice problems.
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This lesson covers adding and subtracting rational expressions when one of the denominators is the LCD. Students can look at guided notes and attempt practice problems.
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This lesson covers adding and subtracting rational expressions when the denominators are the same.
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Here you'll learn how to add and subtract polynomials, as well as learn about the different parts of a polynomial. Practice problems are also included.
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In this lesson students find sums of integers by using a number line. Students examine guided notes, review guided practice, watch instructional videos and attempt practice problems.
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In this lesson students find sums of integers by using a number line. Students examine guided notes, review guided practice, watch instructional videos and attempt practice problems.
A free CK-12 account is required to view all materials.
In this feature, adapted from Interactive NOVA: Earth, students explore the relationship between oxygen concentration and the well-being of various organisms by simulating a change in oxygen levels and observing what happens.
A tutorial as an introduction to polynomials. Basic terminology and simple algebraic manipulations. Offers discussions and practice exercises with answers and explanations.
Students learn how to properly add and subtract decimal quantities.
Understanding that when the total number of parts of a whole are the same, fractions can be added.