Decimal Expansion

1. Aug 24, 2012

Swetasuria

I read here in Physics Forums that a number can have more than one decimal expansion.

Really? Can someone explain how?

Is it that any number can have more than one decimal expansion or only some numbers?

Last edited: Aug 24, 2012
2. Aug 24, 2012

pwsnafu

See the 0.9... article on Wikipedia or the FAQ on this forum.

3. Aug 24, 2012

uart

Hi Swetasuria. You can take the "usual" decimal expansion of any terminating decimal and replace the last digit with one smaller, then add repeating 9's after that, and yes it's the same number.