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Re: [math-learn] significant digits
Posted:
Feb 28, 2002 3:54 PM
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>I wouldn't round off - not at this stage. We always tell our students to
>retain all (or at least most) of their digits until they obtain the final
>answer, and to round off then. There is still another step - to convert to
>miles per hour.
But what if you're "done" with those calculations at that point,
because I was! I didn't convert ALL of those to miles per hour.
Instead I converted 25 miles per hour to meters per second and then
did my comparisons.
So, at that point would you round off? as I did in the chart I wrote
in an earlier message would you write them with 4 or 5 digits as I
did?
>And of course, they would need to retain the four signfiicant digit accuracy
>in the kilometres to miles conversion. Just using a value of 1.6, for
>example, will only give 2 significant digit accuracy in the answer.
Right. I would agree.
Suzanne
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