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


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Título My mystery number
Descrición 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.
Tema Matemáticas
Nivel 11
Tipo Demostración, Guided Activity
Duración 30 minutos
Respostas incluidas Non
Linguaxe English
Palabras clave 1:1 correspondence, cardinality, counting, place value
Simulacións Number Play (HTML5)


Autores Ian Whitacre, Dom Carorora, Azar Kamaldar
Centro Escolar / Institución Florida State University
Presentado 9/11/23
Actualizado 10/14/23