Zdravko Lalchev 1), Margarita Varbanova 2)
1) Sofia University
2) “St. Cyril and St. Methodius” University – Veliko Tarnovo, Bulgaria
Abstract. The authors adapt the inversion method didactically for the purposes of Education and represent its heuristic possibilities in solving „nonstandard” problems in Primary school mathematics.
Кеуwords: primary school mathematics, inversion, transformation, mathematical model, chain diagram
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