%D 2015 %L acta61255 %J PedagĂłgiai ĂrtĂŠkelĂŠsi Konferencia %T A development model of place-value and base-10 system %P 133 %A Herzog Moritz %V 13 %K Matematikai gondolkodĂĄs - elĹadĂĄskivonat