Names of small numbers
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Naming very small numbers is the same as naming very big numbers, but with one important difference. There is a minus sign over what the 10 in the formula is raised to. So if one wanted to write 0.007 in shorthand form, they would write it 7 x 10−3 since 7 is the third digit after the decimal point (the zero in front of the decimal point does not count). Naming a very small number with lots of different numbers inside it is the same as doing it with a very big number, but again with that one difference of the minus sign. So 0.0000452 would become 4.52 x 10−5 (0.0000452 --> 4.52 x 0.00001 --> 4.52 x 10−5).
Some examples
| 0.00000000009 | = | 9 x 10−11 |
| 0.000678 | = | 6.78 x 10−4 |
| 0.000000535645 | = | 5.35645 x 10−7 |
Names of small numbers
| English name | European name | |
|---|---|---|
| 100 | One | One |
| 10−1 | Tenth | Tenth |
| 10−2 | Hundredth | Hundredth |
| 10−3 | Thousandth | Thousandth |
| 10−4 | Ten Thousandth | Ten Thousandth |
| 10−5 | Hundred Thousandth | Hundred Thousandth |
| 10−6 | Millionth | Millionth |
| 10−9 | Billionth | Milliardth |
| 10−12 | Trillionth | Billionth |
| 10−15 | Quadrillionth | Billiardth |
| 10−18 | Quintillionth | Trillionth |
| 10−21 | Sextillionth | Trilliardth |
| 10−24 | Septillionth | Quadrillionth |