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Direct linkSherman, Jody; Bisanz, Jeffrey – Journal of Cognition and Development, 2007
The principle of inversion--that a + b - b must equal a--requires a sensitivity to the relation between addition and subtraction that is critical for understanding arithmetic. Use of inversion, albeit inconsistent, has been observed in school-age children, but when use of a computational shortcut based on inversion emerges and how awareness of the…
Descriptors: Subtraction, Preschool Children, Mathematics Skills, Computation
