000 00680nam a2200241 a 4500
005 20210219153430.0
008 991125n 000 0 u
035 _aUPN01000098522
100 _aLiebech, Pamela
222 _aEDUCATIONAL STUDIES IN MATHEMATICS
245 _aScores and forfeits - an intuitive model for integer arithmetic
300 _a221-240
362 _a21, No. 3, 1990
505 _aEnero 1991
653 0 _aARITMETICA
653 0 _aCONCEPTOS DEL NUMERO
653 0 _aESCUELA SECUNDARIA (MATEMATICAS)
653 0 _aESCUELAS MEDIAS
653 0 _aMODELOS MATEMATICOS
653 0 _aSISTEMA NUMERICO
904 _aAC
_b036333
905 _aArticulo
999 _c76643
_d76643