00507naa#a2200169#i#450# EN\INFRA-M\bibl\86569 20241103181435.7 1998-0728 20240819b2024####ek#y0engy0150####ca RU Preparing Preschoolers to Study Mathematics Journal article Moscow INFRA-M Academic Publishing LLC. 2024 6 с. Journal article local Подготовка к школе. 373.29 Yakovleva E. O. naukaru.ru