Mathigon (@mathigonorg) 's Twitter Profile
Mathigon

@mathigonorg

The Mathematical Playground – making learning more interactive and engaging than ever before, and FREE for everyone. Part of @amplify

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linkhttps://mathigon.org calendar_today12-04-2012 06:35:21

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Mathigon
@mathigonorg

4 months ago

The number tiles, number cards, and the exploding dot machine from on Polypad can model subtraction with regrouping in a variety of ways. Learn more in this Polypad Pointer video at youtube.com/watch?v=QMPcxp…