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new math

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noun
a unified, sequential system of teaching arithmetic and mathematics in accord with set theory so as to reveal basic concepts: used in some U.S. schools, especially in the 1960s and 1970s.
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Also called new mathematics.

Origin of new math

First recorded in 1965–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

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