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Swain, Robert L. 4 0

Understanding arithmetic. 6 6 - - - xxi, 264 p. illus., diagrs. 24 cm. - - - - - . - . - 0 . - . - 0 .







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ISSN: 2 = =

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LCCN: 57006454

Nat. Bib. No.: 2

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Subjects--Topical Terms:
Number concept.;Arithmetic;Arithmetic ----Foundations.;Study and teaching.----20--

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LC Class. No.: QA142 / .S92

Dewey Class. No.: 511 / 2

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