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Academic number spelling Numbers in the science [Home] [Search] [Forum] [Links] [Contact] [Imprint] [Sitemap]
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Unfortunately, academic numbers aren’t as manageable as in most math books. Very big, as well as very small numbers can occur. Example: The distance between the earth and sun is 150 000 000 km. Example 2: The mass of a hydrogen atom (that is about the smallest thing humans know about) is 0,000 000 000 000 000 000 000 001 674 g. But who wants to write such long numbers all the time? You could say that the first example is 150 gigameters but if you to write the number out nothing changes. For the second example you say …. It’s also different. All the zeros can be eliminated by mathematical expressions. For 100 you could say: 10 ∙ 10 or 102 For 1 000 you could say 10 ∙ 10 ∙ 10 or 103 That’s easy. 1 000 has three zeros and so 10 to the power of three is 1 000. So 15 ∙ 107 is 15 with 7 zeros. The ten is omitted in some books and calculators. Then it says that 157 is the distance between the sun and the earth. All the zeros after the comma in example 2 are characterized by negative exponents. You will learn how to calculate that in the 10th grade. So the hydrogen atom is:
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