A curious pair

[ptc-1368288]

...



jmG

[PhilipOakley]

An interesting 'challenge' for the kids as to why it
is true (they often think decimals must be
approximations 😉

Philip Oakley

[ptc-1368288]

On 1/19/2010 7:36:30 PM, philipoakley wrote:
>An interesting 'challenge' for
>the kids as to why it
>is true (they often think
>decimals must be
>approximations 😉
>
>Philip Oakley
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I have another one coming, even more interesting !

Jean

[IRstuff]

Actually, it's not true. If you increase the display precision, the 9/10000000 turns out to be superfluous, because Mathcad is simply truncating the decimal.

TTFN,
Eden

[AlvaroDíaz]

One of the useful quick test for hand calculators:

0123456789 + 9876543210 = 9999999999

for ten digits displays.

There are other to full check the leds in the display filling it with 8's (including mantissa), but can't remember what it is.

Regards. Alvaro.

[TomGutman]

If you increase the display precision to 15, it is clear that that 9/100000000 is required. The whole thing is just a rewrite of the old standby 9x12345679=111111111. That second term is what converts the written 89 to 90.
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� � � � Tom Gutman