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The oldest known multiplication tables were used by the Babylonians about 4000 years ago. [2] However, they used a base of 60. [2] The oldest known tables using a base of 10 are the Chinese decimal multiplication table on bamboo strips dating to about 305 BC, during China's Warring States period. [2] "Table of Pythagoras" on Napier's bones [3]
The table shows what number the order of magnitude aim at for base 10 and for base 1 000 000. It can be seen that the order of magnitude is included in the number name in this example, because bi- means 2, tri- means 3, etc. (these make sense in the long scale only), and the suffix -illion tells that the base is 1 000 000.
m × 10 n. Or more compactly as: 10 n. This is generally used to denote powers of 10. Where n is positive, this indicates the number of zeros after the number, and where the n is negative, this indicates the number of decimal places before the number. As an example: 10 5 = 100,000 [1] 10 −5 = 0.00001 [2]
For example, multiplication is granted a higher precedence than addition, and it has been this way since the introduction of modern algebraic notation. [2] [3] Thus, in the expression 1 + 2 × 3, the multiplication is performed before addition, and the expression has the value 1 + (2 × 3) = 7, and not (1 + 2) × 3 = 9.
At this scale, the width of a human hair is about 10 times that of the image. [71] To help compare different orders of magnitude this section lists lengths between 10 −8 and 10 −7 m (10 nm and 100 nm). 10 nm Shortest extreme ultraviolet wavelength or longest X-ray wavelength [72] 10 nm – the average length of a nanowire
3.828 × 10 26 W astro: luminosity of the Sun, [65] our home star 7.67 × 10 26 W astro: approximate luminosity of Alpha Centauri, the closest (triple) star system. [66] 10 27: ronna-(RW) 9.77 × 10 27 W astro: approximate luminosity of Sirius, the visibly brightest star as viewed from Earth. [67] 10 28: 6.51 × 10 28 W
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