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Thread: Brain Burp Rounding??
face BY : Roman Black email (remove spam text)

I was tabulating some data tonight, ie, doing
a division on my pocket calculator and then rounding
the number to three decimal places, then writing
the figure down on paper.

How do people round numbers to the nearest decimal
place on their pocket calculators?

My whole life I have checked if the last digit is
5, then if so check the next digit is 5, etc,
then once you get to a non-5 round it up or down.
Hope that makes sense.

3.12471 = 3.125
3.12441 = 3.124
3.1245551 = 3.124
3.1245556 = 3.125

This just can't be right!
How were you taught? I started using pocket
calculators when they had led digits, probably
before I was 10 years old. I'm sure in school we
were taught to round digits like that. ??

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