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The Educated Monkey
To multiply must place the paws on the numbers and the result magically appears between the "hands". You can also insert a card that allows you to add: in this way the children understand the relationship between addition and multiplication, It' a true programmable calculator! Of course it also performs divisions: the dividend fits between the "hands" and the result is read at the left paw. Still in commerce and it is used in many schools.
Nicola Marras 2008
Credits: Reinhard Atzbach
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