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Traditional American usage (which was also adapted from French usage but at a later date), Canadian, and modern British usage assign new names for each power of one thousand (the short scale). Thus, a billion is 1000 × 1000 2 = 10 9; a trillion is 1000 × 1000 3 = 10 12; and so forth.
For example "billion" may be easier to comprehend for some readers than "1,000,000,000". But, as names, a numeric value can be lengthy. For example, "2,345,789" is "two million, three hundred forty five thousand, seven hundred and eighty nine".
The Ancient Greeks used a system based on the myriad, that is, ten thousand, and their largest named number was a myriad myriad, or one hundred million. In The Sand Reckoner , Archimedes (c. 287–212 BC) devised a system of naming large numbers reaching up to
Combinations of the unambiguous words such as ten, hundred, thousand and million. For example: one thousand million and one million million. [5] Scientific notation (for example 1 × 10 10), or its engineering notation variant (for example 10 × 10 9), or the computing variant E notation (for example 1e10). This is the most common practice ...
100 000 000 000; short scale: one hundred billion; long scale: hundred thousand million, or hundred milliard) Astronomy: There are 100 billion planets located in the Milky Way. [30] [31] Biology – Neurons in the brain: approximately (1±0.2) × 10 11 neurons in the human brain. [32]
Visualization of 1 trillion (short scale) A Rubik's cube, which has about 43 trillion (long scale) possible positions. Trillion is a number with two distinct definitions: 1,000,000,000,000, i.e. one million million, or 10 12 (ten to the twelfth power), as defined on the short scale. This is now the meaning in both American and British English.
the long scale — designates a system of numeric names formerly used in British English, but now obsolete, in which a billion is used for a million million (and similarly, with trillion, quadrillion etc., the prefix denoting the power of a million); and a thousand million is sometimes called a milliard. This system is still used in several ...
In the lead it now says: Long scale is the English translation of the French term échelle longue. It refers to a system of large-number names in which every new term greater than million is 1,000 times the previous term: milliard means a thousand millions, billion means a million millions, billiard means a thousand billions, trillion means a million billions, and so on.