# How do I divide Decimals?

• Jun 30th 2012, 11:33 AM
Subliminalmessage
How do I divide Decimals?
For example:

30.72
÷ 9.60

and

22.0
÷ 2.0
and
 2.7 ÷ 0.9

You don't have to answer all three, just pick one or do all three if you want, would appreciate that. Just need a simple explanation on how to divide decimals.
• Jun 30th 2012, 11:56 AM
skeeter
Re: How do I divide Decimals?
• Jun 30th 2012, 12:24 PM
nerdo
Re: How do I divide Decimals?
22.0÷ 2.0=11.0

what is 11.0*2=???
• Jun 30th 2012, 12:43 PM
Subliminalmessage
Re: How do I divide Decimals?
Quote:

Originally Posted by skeeter

That is a long way to divide, I don't have that time but luckly division works just the same with decimals as with normal numbers apart from the decimal points which is okay because I'll have multiple choice.
• Jun 30th 2012, 12:44 PM
Subliminalmessage
Re: How do I divide Decimals?
Quote:

Originally Posted by nerdo
22.0÷ 2.0=11.0

what is 11.0*2=???

Not really sure what your getting at there, I mean, that requires too much thinking when it's not needed.

I know what I'm doing now, thanks though.
• Jun 30th 2012, 12:46 PM
richard1234
Re: How do I divide Decimals?
He's basically asking, what is 11x2?
• Jun 30th 2012, 01:13 PM
astartleddeer
Re: How do I divide Decimals?
You can multiply the decimal out of the numerator and denominator. For example:

$\displaystyle \frac {30.72}{9.6} \cdot \frac{100}{100} = \frac {3072}{960}\ from\ which\ simplifies\ to\ \frac{16}{5} = 3.2$
• Jun 30th 2012, 01:36 PM
daigo
Re: How do I divide Decimals?
I thought trailing zeros after the decimal place counts as a significant digit? So 9.60 would be 3 significant digits which means the answer is 3.20? Or is this not correct
• Jun 30th 2012, 01:48 PM
astartleddeer
Re: How do I divide Decimals?
Don't forget, the right hand side of the decimal point is the fractional part. So 0.2 is equal to $\displaystyle 2 \times 10^{-1}$. Which is also equal to 0.20, from which can also be regarded as $\displaystyle \frac{1}{5}.$ 20/100 simplifies to 1/5.