Multiplication trick using estimation

This trick shows how to multiply large numbers using an estimation method and three easy to get reference numbers. This technique will speed up your math multiplication and more importantly get you playing with numbers! To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU
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Видео Multiplication trick using estimation канала tecmath