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I define Mathematical Quantities and explain the difference between constant and variable quantities. Variables, Algebraic Expressions, and Numerical Expressions are also defined before working through many examples of writing algebraic expressions from phrases or sentences. I include Addition (Sum, More Than), Subtraction (Difference, Less Than), Multiplication (Product), Division (Quotients), and when to recognize that parenthesis are needed. EXAMPLES at 6:12 8:51 11:11 12:05 12:43 14:11 16:06 17:00 18:57 Application word problems at 20:46 25:08 26:16 29:30 PS. When I say that six feet tall is 62 inches...that would be 72 inches of course!!! Check out http://www.ProfRobBob.com, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage www.YouTube.com/Profrobbob
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