Description of the types of Real numbers -- Natural, Whole, Integer, Rational, and Irrational. White board in a class setting, some interaction, engaging. The discussion is clear and understandable. Preview - full version at http://video.google.com/v...ideoplay?docid=-2570309009443666446&q=source:012956945238798337823&hl=en Produced by Robert Ahdoot, yaymath.org[more]

From education-portal.com, produced by Education Portal Academy

This video tells what the following types of numbers are: natural numbers, whole numbers, integers, rational numbers, and real numbers. It also discusses how each of these groups of numbers builds upon the group before it. This video was created for ...a free, online College Algebra course, but it can be used for middle school and high school students who are taking Transition to Algebra (Pre-Algebra). (6:56)[more]

Using the question 'If x is a whole number, what other sets does x belong to?'. Mr. Khan uses the Paint Program (with different colors) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. (02:52)

Using the question 'What number sets does the number 8 belong to?', the Mr. Khan explains the categories that numbers can belong to. Mr. Khan uses the Paint Program (with different colors) to illustrate his points. Sal Khan is the recipient of the 20...09 Microsoft Tech Award in Education. (06:06)[more]

Using the question 'What number sets does the number 3.4028 (with the 28 at the end of the number repeating forever) belong to?', Mr. Khan explains the categories that numbers can belong to. Mr. Khan uses the Paint Program (with different colors) to ...illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. (06:52)[more]

Properties discussed: Reflexive Property of Equality,Symmetric Property of Equality, Transitive Property of Equality,Substitution Property, Additive Property of Equality, Cancellation Law of Addition, Multiplicative Property of Equality, Cancellation... Law of Multiplication, Zero-Factor Property, Law of Trichotomy, Transitive Property of Inequality, Properties of Absolute Value, Closure Property of Addition, Closure Property of Multiplication, Commutative Property of Addition, Commutative Property of Multiplication, Associative Property of Addition, Associative Property of Multiplication, Identity Property of Addition, Identity Property of Multiplication, Inverse Property of Addition, Inverse Property of Multiplication, Distributive Law of Multiplication Over Addition, Distributive Law of Multiplication Over Subtraction, General Distributive Property and Negation Distributive Property. (38.27)[more]

In this 3:37 long video the narrator explains how to deal with square roots. To simplify a square root, you can use the branching tree, or you can find a square root multiply it by a square root to get your square root and simplify. The first method ...is easier to understand, but takes a longer amount of time, while the second one requires
less time to do it, but more thinking.[more]

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