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_aConceptual structures for multiunit numbers _eimplications for learning and teaching multidigit addiction, subtraction... _fKaren Fuson |
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| 461 | 1 |
_aCognition And Instruction _vVol. 7, nº 4 (1990), p. 343-403 |
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| 606 | 1 | _aDeposito de Rectaguarda | |
| 686 | _a0220 - Depósito de Retaguarda | ||
| 700 | 1 |
_aFuson _bKaren |
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| 856 | _uhttps://catalogo.ispa.pt/opac/biblioteca/localizacao_doc/dr.htm | ||