My mystery number
- My Mystery Number.pdf - 282 kB
- My Mystery Number.docx - 257 kB
| Title | My mystery number |
| Description | 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. |
| Subject | Mathematics |
| Level | K-5 |
| Type | Demonstration, Guided Activity |
| Duration | 30 minutes |
| Answers Included | No |
| Language | English |
| Keywords | 1:1 correspondence, cardinality, counting, place value |
| Simulation(s) | Number Play (HTML5) |
| Author(s) | Ian Whitacre, Dom Carorora, Azar Kamaldar |
| School / Organization | Florida State University |
| Date submitted | 9/11/23 |
| Date updated | 10/14/23 |