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Updated: May 28, 2025
By using any kind of material by which ten can be made plain as a higher unit bundles of sticks or tickets, Sonnenschein's apparatus, Miss Punnett's number scheme, or the new Montessori apparatus with its chains of beads: the material used is of no great consequence children should be able to deal as easily with tens as with ones, and there is no need for little formal sums which have no meaning.
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