Family of Mr. 10 A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines.


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Title Family of Mr. 10
Description This activity focuses on the addition of numbers to make 10. Students learn how to add a specific number to a given one to make 10. For this purpose students use the sim to test their ideas and learn how to make 10.
Subject Mathematics
Level K-5
Type Guided Activity
Duration 30 minutes
Answers Included No
Language English
Keywords 1:1 correspondence, compose, conservation of cardinality, decompose, grouping, ten
Simulation(s) Number Play (HTML5)


Author(s) Azar Kamaldar, Dom Carorora, Ian Whitacre
School / Organization Florida State University
Date submitted 23/09/11
Date updated 23/10/14