>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.
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