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https://liveyourmaths.com/2016/09/04/%cf%84%ce%b1-%ce%bc%ce%b1%ce%b8%ce%b7%ce%bc%ce%b1%cf%84%ce%b9%ce%ba%ce%ac-%ce%bd%ce%b1-%cf%84%ce%b1-%ce%b4%ce%b9%ce%b4%ce%ac%cf%83%ce%ba%ce%bf%cf%85%ce%bd-%ce%bc%ce%b1%ce%b8%ce%b7%ce%bc%ce%b1%cf%84/
Τα μαθηματικά να τα διδάσκουν μαθηματικοί!