A structured decomposition intervention produced 18-point higher gains in numerical competence for primary students compared to controls, with over 97% retention after four weeks.
The ability to decompose and recompose numbers constitutes an essential prerequisite for mental arithmetic, written calculation, and estimation (Fuson, 1990; Ross, 1989)
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From Manipulation to Abstraction: The Impact of Flexible Decomposition on Numerical Competence in Primary School
A structured decomposition intervention produced 18-point higher gains in numerical competence for primary students compared to controls, with over 97% retention after four weeks.