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kahe lahutamis- ning ühe kontrolltabeli abil omandab laps 18 piires lahutamise ühekohalise lahutatava ja ühekohalise vahega
subtraction working charts . Montessori pedagoogika terminisõnastik. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mon/subtraction%20working%20charts/1/eng (14.07.2026)