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# so can a decimal be an irrational number or.,.. no? ⚑ Flag

by Tori037 at April 27, 2010

## Answers

pi is one of the irrational values

MysteriousAnubis April 27, 2010

An irrational number can ONLY be a decimal. Irrational numbers cannot be represented by fractions. They may involve square roots. Some common irrational numbers are π and e. Example: A rational number is 1/2 or 0.5An irrational number is π which can only be written to a certain number of decimal places such as 3.14159265.

shortround April 28, 2010

Sorry I just read what I initially said and it didn't make sense. Irrational numbers can be approximated in decimal form (eg 1.4142) however to give the exact value, they must be written in a different form (eg √2).So to answer your question, technically a decimal cannot be an irrational number. Irrational numbers have an infinite number of decimals places, so we can only give an approximation in decimal form. The exact value of irrational numbers must be given in another form.

shortround April 28, 2010

yeah it can be.

gibby. April 28, 2010

Yes, a decimal sure can be an irrational number.

minime April 28, 2010

yes it can!!!

jorge__omg....... April 28, 2010

Ya

Grim_the_guitar_guru April 28, 2010

yes it can

COWGIRL April 28, 2010

Sorry to keep on answering your question, but personally I disagree with the answers people have given.An irrational number has an infinite amount of decimal places, but if you write it down (even to 10000 decimal places) you are giving it a finite amount of decimal places. Irrational numbers have exact values that cannot be represented in decimal form.Although everyone here is saying that an irrational number can be a decimal, practically it can't be. You can think of it as a decimal that never ends, but as soon as your write it down, you are simply writing down a similar number, not the exact value of your irrational number.I really hope this helps. I know you will be inclined to listen to the majority of people here, but just read my reasoning and hopefully it makes sense.

shortround April 29, 2010

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