Names of small numbers

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 nameEuropean name
100OneOne
10−1TenthTenth
10−2HundredthHundredth
10−3ThousandthThousandth
10−4Ten ThousandthTen Thousandth
10−5Hundred ThousandthHundred Thousandth
10−6MillionthMillionth
10−9BillionthMilliardth
10−12TrillionthBillionth
10−15QuadrillionthBilliardth
10−18QuintillionthTrillionth
10−21SextillionthTrilliardth
10−24SeptillionthQuadrillionth

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