Monthly Archives: October 2013

Do We Really Need Least Common Denominators?

Posted on October 18, 2013 by jrh794

Using least common denominators (LCD’s) to add and subtract rational expressions (RE’s) is tedious and in many cases unnecessary.  I am attempting to teach the entire algebra chapter on rational expressions without mentioning them.  Instead I use “criss-cross applesauce (CCA)“, … Continue reading →

Posted in Curriculum, Pedagogy, Teaching | Tagged , , | 1 Comment

The Number of Ways to Shuffle Cards Clumsily

Posted on October 1, 2013 by jrh794

I am working on a combinatorial problem.  My current approach is to “shuffle together” the solutions to two smaller problems.  Hence the following. Problem:  How many ways are there to clumsily shuffle two piles of cards together?  Clumsy shuffles include … Continue reading →

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