Abstract
Literature at national and international levels argues the importance of including mental
computation in a mathematics curriculum that promotes number sense. Characteristics of
good mental computers have been documented. However, there is conflicting evidence
about what constitutes high performance in mental computation – high accuracy as a result
of efficient mental strategies and number sense or high accuracy without accompanying
number sense. The purpose of this paper is to present findings of a study that investigated
accurate mental computers and the factors that supported accuracy.
Ann Heirdsfield