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Usnick, Virginia E. – Focus on Learning Problems in Mathematics, 1992
This study compared the effectiveness of teaching multidigit addition of whole numbers without regrouping prior to teaching it with regrouping to teaching multidigit addition with and without regrouping simultaneously. Pretest/posttest-delayed posttest results of second grade students (n=151) from seven randomly assigned classrooms indicated no…
Descriptors: Addition, Cognitive Development, Cognitive Processes, Computation