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An analysis of the strategies used by children in the first and second grades of basic primary education (7-8 years old) from two educational institutions in Bogotá, Colombia, to solve multiplicative situations before receiving instruction on multiplication and division is presented. The analysis focused on identifying whether children recognize different units, simple or compound, and the use they make of these, in particular whether they form units to address given situations and whether they reinterpret these situations with them. This research was developed using the task-based interview method, from which it was possible to find evidence on the strategies used by children, in particular two emerging strategies that have not been reported in the international literature: equivalence between different types of unit and coordinated use of compound units.
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