This video explains why the trick for finding the LCM works. Some people asked to explain the math behind the trick, so here it is.

Josh Rappaport is the author of the Algebra Survival Guide and Workbook, which comprise an award-winning program that makes algebra do-able! The books break algebraic concepts down into manageable chunks and provide instruction through a captivating Q&A format. Josh also is the author of PreAlgebra Blastoff!, which presents an engaging, hands-on approach (plus 16-page color comic book) for learning the rules of integers. Josh’s line of unique, student-centered math-help books is published by Singing Turtle Press and can be found on Amazon.com

Includes new 62-page chapter on Advanced Word Problems

PreAlgebra Blastoff!

Comic-style math book teaches how integers work.

Visit SingingTurtle.com to see ALL our products…more on the way!

At Singing Turtle Press, we believe everyone should succeed at math, no matter how math phobic, no matter how right-brained, no matter what. Our products help students K-12 and beyond, including English language learners, and adults returning to college.
Visit Josh's new blog at http://www.algebrawizard.com/blog/

Written

on February 7, 2013