A machine made of paper that multiplies two factors by counting marbles. To understand better take a look at the video below and, if you like it, download the free templates and build yours. Perfect for teachers and school works.
O que essa complicada máquina de papel faz é multiplicar dois fatores, usando para isso bolas de gude. Para entender melhor dè uma olhada no vídeo abaixo e, se gostar, baixe o template gratuíto e monte a sua. Perfeita para professores e trabalhos escolares.
Link: Multiplication.Machine.Paper.Model.by.Digitprop
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