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square roots of rationals

accurate square roots of rationals
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Mathematics Subject Classification

11A25 no label found12F05 no label found


I think it's a vast overstatement to say that the forms

sqrt(1.8) and sqrt(5/3)

are not acceptable. In fact, I think that in many situations they should be preferred. While I concede that it's handy for an instructor to be able to immediately glance at a solution and see whether or not it agrees with the one standard answer, I think the pedagogical cost of arbitrarily dictating that other forms are not acceptable is too high.

I would rephrase the entry as presenting a procedure for putting expressions like the ones above into a standard form, without issuing any judgment on which is better.


You may be right -- I will alter the expression.

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