By ΠΠΎΡΠΎΡ ΠΎΠ²Π° ΠΠ½Π½Π° ΠΠΈΡ Π°ΠΉΠ»ΠΎΠ²Π½Π°
ΠΠ½ΠΈΠ³Π° Π΄Π»Ρ ΠΏΠΎΠ΄Π³ΠΎΡΠΎΠ²ΠΊΠΈ Π΄Π΅ΡΠ΅ΠΉ ΠΊ ΡΠΊΠΎΠ»Π΅ ΠΏΠΎ ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΠΊΠ΅.
A book for preparing children for school in mathematics.