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Direct linkSelter, Christoph; Prediger, Susanne; Nuhrenborger, Marcus; Hussmann, Stephan – Educational Studies in Mathematics, 2012
Subtraction can be understood by two basic models--taking away (ta) and determining the difference (dd)--and by its inverse relation to addition. Epistemological analyses and empirical examples show that the two models are not relevant only in single-digit arithmetic. As curricula should be developed in a longitudinal perspective on mathematics…
Descriptors: Equations (Mathematics), Mathematics Instruction, Learning Processes, Subtraction
