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arvude hierarhia vahendi abil saab laps võrreda arve 1, 10, 100, 1000, 10 000, 100 000 ja 1 000 000
geometric hierarchy of number . Montessori pedagoogika terminisõnastik. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mon/geometric%20hierarchy%20of%20number/1/eng (11.07.2026)
