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Matrices -- Matrices on the Calculator

Module by: Kenny M. Felder. E-mail the author

Summary: A teacher's guide to working with matrices on the calculator.

This starts with a lecture. You have to show them how to do matrices on the calculator. They should be able to…

  • Enter several matrices at once
  • Add several matrices
  • Subtract
  • Multiply
  • Find inverses

All of this is explained step-by-step in the “Conceptual Explanations.”

There are two things I stress. First, whenever I enter a matrix, I always check it. For instance, after I enter matrix [A], I go back to the home screen and go [A][Enter], and the calculator displays matrix [A] to me, so I can make sure I typed it right. One small mistype will ruin a whole problem, and it’s really easy to do!

Second, the calculator is very smart about interpreting equations. After you enter three matrices, you can just type [A][B]-1-[C] and it will multiply [A] by the inverse of [B] and then subtract [C].

Homework

“Homework—Calculators.” Depending on how things go, they may be able to finish this in class and have no homework.

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Definition of a lens

Lenses

A lens is a custom view of the content in the repository. You can think of it as a fancy kind of list that will let you see content through the eyes of organizations and people you trust.

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