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vahend, mille abil tutvub laps arvu järkudega ühelistest tuhandelisteni
kümnendsüsteemi tutvustus . Montessori pedagoogika terminisõnastik. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mon/k%C3%BCmnends%C3%BCsteemi%20tutvustus/1/est (28.07.2026)
