Multidigit addition : a study of an alternate sequence
Usnick, Virginia E.
Multidigit addition : a study of an alternate sequence - 53-62 - 14, No. 3, 1992
Febrero 1993 = FOCUS ON LEARNING PROBLEMS IN MATHEMATICS
ADICION COMPUTACION DESARROLLO COGNOSCITIVO ENSE\197ANZA MATEMATICA METODOS DE ENSE\197ANZA NUMEROS ENTEROS
Multidigit addition : a study of an alternate sequence - 53-62 - 14, No. 3, 1992
Febrero 1993 = FOCUS ON LEARNING PROBLEMS IN MATHEMATICS
ADICION COMPUTACION DESARROLLO COGNOSCITIVO ENSE\197ANZA MATEMATICA METODOS DE ENSE\197ANZA NUMEROS ENTEROS