00504nam a2200133Ia 450000500170000000800410001704100080005808200170006610000240008324500330010726000480014030000160018865001660020420191018115029.0190710s9999    xx            000 0 und d  aeng  a375.51 C8641  aCrescimbeni, Joseph 0aTeaching the new mathematics  aWest Nyack, N Vb: Parker Publishing,c1966  axviii,205p.  aCurriculum a|Teaching - Mathematicsa|Numeration a|Arithmetic - Operationsa|Set theory a|Games and enrichment a|Mathematics - Teaching a|Decimal fractions