Duration 7:58
Math tricks for fast calculation
Published 14 Mar 2014
This fast math trick can be used to multiply any number by 5, 25 or 125 easily. To donate to the tecmath channel:https://paypal.me/tecmath To support tecmath on Patreon: https://www.patreon.com/tecmath To buy tecmath mechandise: https://teespring.com/stores/tecmath-store
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