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Peltenburg, Marjolijn; van den Heuvel-Panhuizen, Marja; Robitzsch, Alexander – Educational Studies in Mathematics, 2012
In this study, we examined special education students' use of indirect addition (subtraction by adding on) for solving two-digit subtraction problems. Fifty-six students (8- to 12-year-olds), with a mathematical level of end grade 2, participated in the study. They were given a computer-based test on subtraction with different types of problems.…
Descriptors: Subtraction, Special Education, Addition, Arithmetic