91¶¶Òõ

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91¶¶Òõ

Last updated

25 March 2013

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An attempt to make the numbers more visual in their sets plus some 'facts' to talk about. Cuisenaire rods and a track or a long cm ruler are extra aids to show e.g. 4x7 with 4 of 7-rods - where do they reach to? Sets and facts illustrated with PCS or Widgit symbols.
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13 years ago
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