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Addition, Subtraction, Multiplication, Division
There are 20 videos in this category and 647 videos in 82 subcategories.
Category Videos
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Not Right For WatchKnowLearn
Ages: 7 - 10
2023 Views:
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Addition is really about finding sums, or totals. Subtraction is about finding the difference between two numbers. Learn more about adding and subtracting without regrouping with this step-by-step, interactive video from StudyJams. A short, self-c...hecking quiz is also included with the link.
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June 18, 2011 at 10:40 PM
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Not Right For WatchKnowLearn
Ages: 4 - 13
1107 Views:
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This short video teaches you how to use the order of operations correctly. They use Please Excuse My Dear Aunt Sally.
Please - Parenthesis, Excuse - Exponents, My - Multiplication, Dear - Division, Aunt - Addition, and Sally - Subtraction as a mnem...onic devise.
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February 15, 2012 at 01:57 PM
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Not Right For WatchKnowLearn
Ages: 6 - 11
4676 Views:
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In this computer animated video, students are taught to add two digit numbers using regrouping. Students are also shown a strategy for adding two digit and one digit numbers using mental math. ( 3:23)
November 28, 2010 at 06:55 PM
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Not Right For WatchKnowLearn
Ages: 5 - 8
3411 Views:
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This song talks about adding and subtracting. It explains what it means to add and what it means to subtract, then illustrates the concepts with simple word problems and accompanying pictures. It also talks about plus and minus and words that also ...mean adding and subtracting. This is a great resource to introduce and/or review these crucial mathematical skills in the elementary classroom. (2:31)
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June 9, 2010 at 02:35 PM
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Not Right For WatchKnowLearn
Ages: 5 - 8
3656 Views:
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This jazzy song by Jack Hartmann is accompanied by a fun video. It talks about addition and subtraction and incorporates movement. When the answer to a given addition problem is 3, the song tells the viewer to move 3 parts of his/her body. This wo...uld be a fun way to review and practice simple addition and subtraction facts. The words to the song and the number sentences also appear on the screen.
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June 9, 2010 at 02:42 PM
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Not Right For WatchKnowLearn
Ages: 12 - 18
3377 Views:
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This lesson consists of showing you how to use the Sieve of Eratosthenes to find all prime numbers below a certain value. In this case, below 100.
November 9, 2009 at 04:02 AM
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Not Right For WatchKnowLearn
Ages: 11 - 13
1553 Views:
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A fun lesson. Nicholas Hyde, head of science in a school in England teaches Grade 6 maths students how to analyse juggling techniques to introduce number sequences and algebra. (In England people say "maths" instead of "math")
June 16, 2010 at 12:18 PM
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Not Right For WatchKnowLearn
Ages: 7 - 9
1532 Views:
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Explanation and example of commutative propety of Addition
November 22, 2010 at 10:31 PM
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Not Right For WatchKnowLearn
Ages: 13 - 18
775 Views:
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En este video, el profesor habla sobre varias operaciones básicas. Empieza con el valor absoluto y sigue con la suma de enteros, resta de enteros, multiplicación de enteros, y la división de enteros. El video ofrece ejemplos de cada operacion. (10:17...)
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February 4, 2012 at 04:45 PM
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Not Right For WatchKnowLearn
Ages: 6 - 11
547 Views:
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In this video, Mr. Almeida explains how to use mental strategies to add and subtract within 20 using the relationship between addition and subtraction. This is one of the strategies suggested in the Common Core State Standards for Mathematics, 1.OA.6... and 2.OA.2. This would be a great resource for teacher professional development or for direction instruction. (4:22)
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April 21, 2012 at 09:49 PM
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