Monthly Archives: October 2013

Do We Really Need Least Common Denominators?

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

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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