Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20 (e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.)
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Not Right For WatchKnowLearn
Ages: 8  13
5680 Views:

This video indicates it is for prealgebra, however this would be good for anyone who is reviewing or learning about putting word problems into statement form. They use humor to teach this concept. They use many different examples to reinforce what i...s being taught. Video is good quality and good for all students as review or initial learning of the concept. (7:01)
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July 31, 2009 at 08:56 AM


Not Right For WatchKnowLearn
Ages: 3  7
9232 Views:

In this Sesame Street clip, LL Cool J and Elmo sing the Addition Expedition song. Elmo learns how to "add 'em up."(2:09)
July 13, 2009 at 01:35 PM


Not Right For WatchKnowLearn
Ages: 8  16
4406 Views:

This video indicates it is for prealgebra, however this would be good for anyone who is reviewing subtraction. In this video they show how to subtract using the number line, this includes negative numbers. They do this using many different examples.... Then they do a word problem using the number line and then equation form. Once again they do a few examples. Video is good quality and it is good for all.students as review or initial learning of the concept. (06:56)
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July 31, 2009 at 08:44 AM


Not Right For WatchKnowLearn
Ages: 4  7
3827 Views:

Using counters, students will learn how to write a subtraction problem and determine the answer. Count the objects in the whole group, cross out to take away and write how many are left. 9  4.
May 14, 2010 at 01:03 PM


Not Right For WatchKnowLearn
Ages: 7  12
3411 Views:

Khan Academy Present a word problem with cookies (13:06) Sal Khan uses computer software and different colors for demonstration.
June 7, 2011 at 06:17 PM


Not Right For WatchKnowLearn
Ages: 5  9
3017 Views:

In this video, the instructor uses the software to review how to subtract numbers visually. The instructor also uses a number line. The video is suitable for elementary students. (12:32)
January 27, 2010 at 02:48 AM


Not Right For WatchKnowLearn
Ages: 8  13
3583 Views:

This is an introduction to basic word problem terms. Larry discusses key words that are usually associated with a particular mathematical operation. Terms are shown for addition, subtraction, multiplication, and division. (02:37)
May 5, 2010 at 08:43 PM


Not Right For WatchKnowLearn
Ages: 8  11
3597 Views:

Using one, two, and threedigit numbers, students learn how to subtract numbers without borrowing in columns. They use their
knowledge of number families to find the missing numbers in tables using addition and subtraction. Finally, students lear...n key words to look for in word problems that signal addition or subtraction operations.
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June 2, 2010 at 12:17 PM
