Resources and Tools for Elementary Math Specialists and Teachers
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    • 4
      Nice technique employed for GCF and LCM
      By Uncle Bob on 06/21/2012 - 12:02
    • The applet works well. It limits the students making factor trees to no more than 2 factors at a time (i.e. 8 cannot be branched into 2x2x2 in one step). When putting common factors into the Venn diagram intersection, multiple copies are blanked out so that the product of remaining factors is the LCM. The teacher might want to point out that feature as different from what you do with 2 complete prime factorizations to get LCM.