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It means that a number expressed as a decimal notation isn't being expressed as a fractional notation. 0,25 and 1/4. ( Both represent the same)

(It's easier to work on fractional notation although the results are the same.)

5/165 = 0,0303030303030303030303030303030.....................

In this example the decimal notation has an infinite length, but you can cut the unnecessary decimal figures= 0,030

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12y ago
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Q: What does decimal notation mean in math?
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