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Kilhamn, Cecilia – Research in Mathematics Education, 2018
Mathematically speaking, a "difference" is the result of a subtraction. However, when the number domain is extended from natural numbers to integers, the separation of the magnitude of a number from its value creates "different differences," where the connection to subtraction is no longer straightforward. Based on…
Descriptors: Arithmetic, Addition, Subtraction, Mathematics Instruction

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