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Curated Video
Subtracting by Using Addition: Mastering 2-Digit Subtraction
In this lesson, students will learn how to subtract large numbers by using addition. By understanding the relationship between addition and subtraction, students can reframe subtraction problems as addition sentences and use strategies...
Curated Video
Writing Numerical Expressions from Verbal Descriptions
The examples in this video cover addition, subtraction, multiplication, and division, and highlight the importance of understanding the meaning of math vocabulary words. The teacher also emphasizes the concept of equivalent expressions...
Curated Video
Breaking Apart Numbers to Explain Subtraction
In this video, we learn different ways to break apart numbers to make subtraction easier. We can use words, place value blocks, drawings, and addition to explain subtraction. By breaking apart numbers in different ways, we can compare...
Curated Video
Choosing Strategies for Explaining Addition and Subtraction
In this lesson, students will explore different strategies to prove correctness, including using place value, breaking numbers apart, and utilizing the commutative and associative properties of addition. By analyzing examples and...
Professor Dave Explains
Multiplication and Division of Small Numbers
Basic multiplication and division.
Curated Video
Adding and Subtracting within 20 Using Doubles
In this video, students learn how to add and subtract within 20 by using doubles. The teacher explains the concept of doubles facts and how they can make adding easier. Students also learn about fact families and how addition and...
Curated Video
Subtracting Within 20: Finding the Difference Between Two Numbers
This video is a math lesson that teaches how to subtract within 20 by finding the difference between two given numbers. The video starts by reviewing the definition of subtraction and explaining how subtraction is related to addition...
Curated Video
Simplifying Expressions with Order of Operations
In this video, you will learn how to simplify whole number expressions using the order of operations. The lesson introduces the acronym GEMDAS, which stands for grouping, exponents, multiplication, division, addition, and subtraction, to...
NUMBEROCK
Integers
Erika discovers integers in the most fun real life situations - watch her as she snorkels by primordial creatures, borrows some money to buy a ticket to go skydiving, and put's on her coat in sub-zero temperatures for a snowball fight!...
NUMBEROCK
Subtraction (Regrouping)
Farmer Jerry loves to rap about regrouping as much as he hates getting chased by those pesky bees! Listen to Farmer Jimmy spin some slick rhymes as he shows us what's going on when we regroup in subtraction. Come along and take a visit...
Lesson Planet
EdTech Tuesday: Todo K-2 Math Practice
Support your youngsters as they learn basic math skills by providing this app! Jennifer and Rich demonstrate how to practice addition and subtraction and use the app's main features.
Lesson Planet
EdTech Tuesday: AnimalWatch
Kids love animals, so encourage them to explore matches with animal-themed math. Jennifer and Rich present the app's features, spending particular time on how to use it and apply it to your classroom needs.
Lesson Planet
EdTech Tuesday: MathTime RT
Are you trying to integrate technology into the elementary math curriculum but having trouble finding the right tools? Rich and Jennifer are here to help as they explore this fun skills practice app and point out considerations when...
Curated OER
Subtracting Negatives
The teacher shows four different examples of subtracting negative numbers by leaving the first value the same and then adding the opposite of the second value.
Khan Academy
More Examples of Addition and Subtraction of Polynomials, Algebra II
Though they " sound like a really fancy word," polynomials prove to be no match for Sal's mathematical skills. After defining the term and providing a few examples, Sal works through a few equations that add or subtract polynomials,...
Khan Academy
Adding and Subtracting Fractions
This video shows how to add, subtract, and simplify fractions using a pie graph and an infinite blackboard. Once he has established the rule, Sal throws the viewer a curve ball with a fraction subtraction problem that results in a...
Khan Academy
Adding/Subtracting Negative Numbers, Pre-Algebra
Guiding viewers through the addition and subtraction of numbers, this video includes many tips to help new learners internalize the concept of a number line. It clarifies the relationship between positive and negative numbers, including...
Khan Academy
Example 3: Subtracting Polynomials, Algebra I
To subtract two polynomials, Sal demonstrates that you add the opposite of the second term, and then combine like terms to solve. How do you find an opposite term? Multiply the polynomial by -1. This video is very clearly explained and...
Khan Academy
Subtracting Mixed Numbers 2, Fractions, Pre-Algebra
To subtract mixed numbers, it may be necessary to find the least common multiple to establish a common denominator. This is just what Sal does in this presentation. First, he shows how to find a common denominator and then the process...
Corbett Maths
Subtracting Decimals
Take away any confusion on subtracting decimals. A short, instructional video shows mathematicians how to subtract decimals. Viewers see four examples, one where the minuend and subtrahend have the same number of decimal places, one...
Art of Problem Solving
Subtraction and the Distributive Property
There's got to be a better way. Scholars learn that the distributive property does work with subtraction and not just addition. Using that fact, the video shows how to find the product of two numbers by rewriting a complicated number as...
Art of Problem Solving
Subtraction Problems
Subtraction does not work with the commutative property ... or does it? Confronted with a difficult problem, the narrator realizes that by writing the subtractions as adding a negative, he can rearrange the problem. Pupils learn that as...
Art of Problem Solving
Subtraction with Negatives Part 2
Dive deeper into subtraction. The presenter shows two more ways to use the definition of subtraction to solve subtraction problems. Using the distributive and commutative properties, pupils learn how to solve problems such as subtracting...