- #106

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Mentat said:I'm sure most of you already know this. The real point of the thread is finding different ways of approaching it. You see, I have a friend who refuses to accept what seems to me to be so obvious: .9 repeating (infinite 9s after the decimal) is exactly equal to the whole number 1.

Here is how I look at it.

You start of with .9999... and continue until you either run out of time or get tired. Now you are at a crossroads. At this stage you decide if it is still .9999... or 1. Conclusion is what one reaches when one is out of time. Just because you are tired of traveling through the infinite, .9999 does not equal 1 irrespective of all the mathematical equations.

Rounding off is only to solve equations. To further extend this, you either use whole numbers or fractions. You should not criss-cross domains like this.