Kitchen > PrivateWebHome > WebLog > TwentyMillionths
02 Mar 2006 - 23:07

## how do you write 'twenty millionths' as a decimal number?

Place Value Chart
```                0.000000001   one billionth

0.00000001   one hundred-millionth
0.0000001   one ten-millionth
0.000001   one millionth

0.00001   one hundred-thousandth
0.0001   one ten-thousandth
0.001   one thousandth
0.01   one hundredth (1 in the hundredths place)
0.1   one tenth (1 in the tenths place)

1   one (1 in the ones or units place)
10   ten (1 in the tens place)
100   one hundred  (1 in the hundreds place)

1,000   one thousand (1 in the thousands place)
10,000   ten thousand
100,000   one hundred thousand

1,000,000   one million
10,000,000   ten million
100,000,000   one hundred million

1,000,000,000   one billion
10,000,000,000   ten billion
100,000,000,000   one hundred billion

1,000,000,000,000   one trillion...
```

source:
Math Forum

-- CatherineJohnson - 02 Mar 2006

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Look here for syntax help.

0.00002

-- GoogleMaster - 02 Mar 2006

Err..... showing my work:

```0.000001   one millionth
x 20
--------
0.000020
```

-- GoogleMaster - 02 Mar 2006

2.0E-5

8-)

-- DougSundseth - 02 Mar 2006

20E-6

Makes converting to units much easier. It's 20 micrometres (or grams, or watts, or whatever).

-- TracyW - 03 Mar 2006

SI Prefixes

yocto = 10 ^-24 Yikes!

Prefixes for Binary Multiples

My cheese has moved. I always thought that kilo in kilobit, meant 2^10 or 1024 bits, but I'm wrong. kilo always means 10^3. Apparently the powers that be decided that this confusion (for the masses) needed to be cleared up.

The prefix for 2^10 is Kibi-, so it would be a "kibibit". This sounds like some kind of dog food. "Come here, Astro, have a bowl of kibibits!"

I don't think I will ever be able to tell anyone that my computer has an 80 mebibyte drive.

Speaking of powers of 10, here is one of my favorite sites.

-- SteveH - 03 Mar 2006

In a similar vein to the powers of 10 website, check out the Megapenny Project.

-- MattGoff - 03 Mar 2006

WebLogForm
Title: how do you write 'twenty millionths' as a decimal number?
TopicType: WebLog
SubjectArea: MathProblemHelpLine, MiddleSchoolMath
LogDate: 200603021806