Standard (normal) form of a number

Very large and very small numbers can be expressed in a clearly arranged form as a product of two powers.

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The product consists of two numbers, one of them is a number between 1 and 10 (which is a coefficient), while the other one is a power of 10.

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A positive index means that we have to multiply the coefficient with the power of 10.

E.g. 5.4·10⁴=5.4·10000=54000

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A negative index means that we have to divide the coefficient with the power of 10.

E.g. 2.7·10^-3=2.7·0.001=0.0027

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Absolute value of a number

The absolute value of a real number is that number's distance from zero which is always positive. In practice "absolute value" means to remove any negative sign in front of a number

 

The absolute value has the following four fundamental properties:

 

Oldal: Standard (normal) form of a number
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