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100   ^a20150619d2015    k  y0porb0103    ba
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200 1 ^aTwo perspectives on proportional relationships^eextending complementary origins of multiplication in terms of quantities^fSybilla Beckmann and Andrew Izák
461  1^tJournal for research in mathematics education^cReston^bNational Council of Teachers of Mathematics^d2015^x0021-8251^vVol. 46, nº 1^pp. 17-38
606   ^aEnsino da Matemática^2ESEC
606   ^aOperações^2ESEC
606   ^aMultiplicação^2ESEC
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700  1^aBeckmann,^bSybilla
701  1^aIzák,^bAndrew^4070
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