Numbers, and How to Use Them: By the Natural Method; A Complete, Practical Arithmetic, for Self-Help and for Schools Other Than the Primary (Classic Reprint) - Tapa blanda

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Excerpt from Numbers, and How to Use Them: By the Natural Method; A Complete, Practical Arithmetic, for Self-Help and for Schools Other Than the Primary

Concrete number. A phrase without meaning. Things numbered are concrete, but the number is abstract.

Second, all operations upon numbers are deduced from the fundamental process of counting.
Third, formal definitions and rules are altogether omitted.

Fourth, geometrical principles are reserved for the science of geometry, where they properly belong.

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