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Direct linkLemaire, Patrick; Callies, Sophie – Journal of Experimental Child Psychology, 2009
Strategies used to solve two-digit addition problems (e.g., 27 + 48, Experiment 1) and two-digit subtraction problems (e.g., 73 - 59, Experiment 2) were investigated in adults and in children from Grades 3, 5, and 7. Participants were tested in choice and no-choice conditions. Results showed that (a) participants used the full decomposition…
Descriptors: Grade 3, Subtraction, Arithmetic, Mathematical Concepts
