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Action at a fraction of the usual

The calculator performs four basic operations with fractions ordinary. The result returns in the form of a fraction improper and nieskracalnego.

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Weighted average ratings

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Conversion between number bases

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Trigonometric functions calculator

Calculator by entering an angle in degrees or radians calculated values ​​of the basic trigonometric functions.
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Fractions change form

The calculator converts a fraction to a decimal or vice versa.
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Verification of the REGON number in Poland

Verifier allows you to validate entered REGON number
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Calculate how long you go on foot

Calculator calculates the approximate time given distance and overcome the distance on foot.