My mystery number A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines.


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Otsikko My mystery number
Kuvaus This activity focuses on understanding numerals as representing objects or sets of objects. It addresses the distinction between using place value and not using place value. For example, in the image above, 1 and 2 are placed next to each other. This means that one puppy and two puppies are hiding. The total number of puppies hiding is three, not twelve.
Aihe Matematiikka
Taso K-5
Tyyppi Demonstraatio, Guided Activity
Kesto 30 minuuttia
Vastaukset mukana Ei
Kieli Englanti
Avainsanat 1:1 correspondence, cardinality, counting, place value
Simulaatiot Numeropeli (HTML5)


Tekijät Ian Whitacre, Dom Carorora, Azar Kamaldar
Koulu / organisaatio Florida State University
Lähetetty 11.9.2023
Päivitetty 14.10.2023