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vahend, mille abil tutvub laps arvu järkudega ühelistest tuhandelisteni
kymmenjärjestelmän esittely . Montessori pedagoogika terminisõnastik. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mon/kymmenj%C3%A4rjestelm%C3%A4n%20esittely/1/fin (23.08.2026)
