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Names for small numbers Facts for Kids. Kiddle Encyclopedia.
Names for small numbers facts for kids
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 for small numbers
English name | European name | |
---|---|---|
10^{0} | 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 |