MENTAL ARIFMETIKA | ABAKUS KIDS

@abakus_kids_official


🏆 Mental Arifmetika - bu abakus yoki tasavvurda yirik xonali sonlar bilan ham arifmetik amallar (qo'shish, ayirish, ko'paytirish, bo'lish)ni tezkorlikda bajarishni o'rgatuvchi fan.