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Description: Prove that sum of two periodical decimal fractions with, generally speaking, different number of digits in a period is itself a periodic decimal fraction.
Tags: addition algebra decimal fraction number periodic unizor unizor.com
Description: Prove that product of two periodical decimal fractions with, generally speaking, different number of digits in a period is itself a periodic decimal fraction.
Tags: algebra decimal fraction math periodic product rational unizor unizor.com
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